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Detonation control modules and detonation control circuits are provided herein. A trigger input signal can cause a detonation control module to trigger a detonator. A detonation control module can include a timing circuit, a light-producing diode such as a laser diode, an optically triggered diode,

Detonation control modules and detonation control circuits are provided herein. A trigger input signal can cause a detonation control module to trigger a detonator. A detonation control module can include a timing circuit, a light-producing diode such as a laser diode, an optically triggered diode, and a high-voltage capacitor. The trigger input signal can activate the timing circuit. The timing circuit can control activation of the light-producing diode. Activation of the light-producing diode illuminates and activates the optically triggered diode. The optically triggered diode can be coupled between the high-voltage capacitor and the detonator. Activation of the optically triggered diode causes a power pulse to be released from the high-voltage capacitor that triggers the detonator.

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1. A method of fracturing an underground geologic formation along a section of a bore hole in the underground geologic formation, the method comprising: positioning a plurality of longitudinally spaced apart explosive charges along the section of the bore hole; anddetonating the plurality of longitu

1. A method of fracturing an underground geologic formation along a section of a bore hole in the underground geologic formation, the method comprising: positioning a plurality of longitudinally spaced apart explosive charges along the section of the bore hole; anddetonating the plurality of longitudinally spaced apart explosive charges with the explosive charges releasing a total energy equal to or greater than twelve kJ/cc and with greater than 30% of the energy released by the explosive being released in the following flow Taylor Wave of the detonated explosive charges;the detonation fracturing the underground geologic formation in a first fracture zone adjacent to and surrounding the section of the bore hole and extending radially into the underground geologic formation to a first radial depth of penetration away from the section of the bore hole, the detonation also fracturing the underground geologic formation in plural second fracture zones longitudinally spaced apart from one another and extending radially into the underground geologic formation to a second radial depth of penetration away from the section of the bore hole greater than the first radial depth of penetration. 2. The method of claim 1, wherein the act of positioning comprises positioning a plurality of adjacent explosive charges along the section of the bore hole; and wherein the act of detonating comprises detonating a plurality of adjacent explosive charges from adjacent ends of the adjacent charges. 3. The method of claim 2, further comprising independently timing the detonation of at least a plurality of the respective explosive charges. 4. The method of claim 1, wherein the act of positioning comprises positioning pairs of adjacent explosive charges with the explosive charges of each pair being arranged in an end to end relationship, and wherein the act of detonating comprises detonating the pairs of adjacent explosive charges by detonating each explosive charge of the pair of charges from an end that is adjacent to the end of the other explosive charge of the pair of explosive charges. 5. The method of claim 1, wherein the act of positioning comprises positioning intercoupled explosive charge containing tubes in an end to end relationship along the section of the bore hole and wherein the act of detonating comprises detonating explosive charges in the explosive charge containing tubes at adjacent ends of the tubes. 6. The method of claim 5, further comprising placing at least one inert working liquid containing tube between the explosive charge containing tubes. 7. The method of claim 6, further comprising placing at least one propellant charge intermediate to a plurality of explosive charges and initiating the combustion of the propellant charge simultaneously with or prior to the detonation of the explosive charges. 8. The method of claim 7, wherein the act of placing at least one propellant charge comprises placing at least one pair of propellant containing tubes intermittent to first and second explosive charge containing tubes and initiating the combustion of the propellant in each of the propellant containing tubes of the pair of propellant containing tubes along a substantial portion of the length of the propellant containing tubes. 9. The method of claim 8, further comprising initiating the combustion of the propellant in each propellant containing tube of the pair of propellant containing tubes from locations adjacent to both ends of the propellant containing tubes. 10. The method of claim 1, further comprising placing at least one propellant charge intermediate to a plurality of explosive charges and initiating combustion of the propellant charge. 11. The method of claim 10, further comprising initiating the combustion of the propellant simultaneously with or prior to the detonation of the explosive charges. 12. The method of claim 10, wherein the act of placing propellant charges comprises placing at least one pair of propellant containing tubes intermittent to first and second explosive charges and initiating the combustion of the propellant in each of the propellant containing tubes of the pair of propellant containing tubes along a substantial portion of the length of the propellant containing tubes. 13. The method of claim 12, further comprising initiating the combustion of the propellant in each propellant containing tube of the pair of propellant containing tubes from locations adjacent to both ends of the propellant containing tubes. 14. The method of claim 10, further comprising detonating the explosive charges and initiating the combustion of each propellant charge to fracture the section of the underground geologic formation in a first fracture zone adjacent to and surrounding the section of the bore hole and extending into the underground geologic formation to a first depth of penetration away from the section of the bore hole and plural second fracture zones spaced apart from one another and extending into the underground geologic formation to a second depth of penetration away from the section of the bore hole greater than the first depth of penetration. 15. The method of claim 10, further comprising independently timing the initiation of combustion of the respective propellant charges. 16. The method of claim 10, further comprising independently timing the initiation of combustion of at least a plurality of the respective propellant charges. 17. The method of claim 1, wherein the second fracture zones are in the form of respective longitudinally spaced apart disc-like fracture zones extending radially outwardly from the bore hole. 18. The method of claim 1, wherein the second depth of penetration averages at least six times the average first depth of penetration. 19. A fractured geologic rock formation resulting from the method of claim 18. 20. The method of claim 1, further comprising: performing a numerical or computational analysis using constitutive models of the material forming the underground geologic formation adjacent to the section of the bore hole based on data concerning such material;performing a first simulation of the reaction of the material to explosive pressure from explosive charges, and pressure from propellant charges and working liquid;performing plural additional of such simulations with the explosive charges, propellant charges, and working liquid, simulated to be positioned at different locations or in different arrangements;determining from such simulations a simulation that results in rubblization discs being produced in the geologic formation;selecting the arrangement of explosive charges, and propellant charges, that correspond to the simulation that produced such rubblization discs at desired locations and penetration depths;thereafter positioning the selected arrangement of explosive charges, propellant charges, and working liquids, along the section of the bore hole to be fractured; anddetonating the selected arrangement of explosive charges and initiating combustion of the propellant to produce the fractured geologic formation with rubblization discs. 21. The method of claim 1, further comprising independently timing the detonation of the respective explosive charges. 22. A geologic rock formation having an explosion or combination explosion and propellant combustion created fracture structure adjacent to a section of a previously drilled bore hole in the structure, the bore hole existing prior to fracturing the structure, the fractured structure comprising a first zone of fractured material extending a first radial distance away from the location of the previously existing bore hole and plural second zones of fractured material longitudinally spaced apart from one another and extending radially outwardly from the location of the previously existing bore hole to a second radius from the bore hole that is greater than the first radial distance. 23. The fractured geologic rock formation of claim 22, wherein the second zones of fractured material comprise a plurality of longitudinally spaced apart and radially extending rubblization discs of fractured geologic material. 24. A method of fracturing an underground geologic formation in situ along a section of a bore hole in the underground geologic formation, the method comprising: positioning a plurality of longitudinally spaced apart charges along the section of the bore hole; anddetonating the plurality of longitudinally spaced apart charges to produce a first rubblization zone radially adjacent to the section of the bore hole and along a longitudinal length of the section of the bore hole, and two or more longitudinally spaced apart second rubblization zones extending radially outwardly from the section of the bore hole radially beyond the first rubblization zone, each second rubblization zone being located longitudinally between an adjacent two of the plurality of longitudinally spaced apart charges. 25. The method of claim 24, wherein the act of positioning comprises positioning a plurality of spaced apart charges comprising plural propellant charges. 26. The method of claim 25, wherein the act of positioning comprises positioning a plurality of spaced apart explosive charges. 27. The method of claim 26, further comprising positioning one or more working liquid containers intermediate to the positioned charges. 28. The method of claim 24, further comprising configuring the charges based at least in part on the structure of the geologic formation along the section of the bore hole to produce spaced apart, disc-like, coalescing shock waves in the geologic formation. 29. A system for performing the method of claim 28.