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Information × Registration Number 0210U007096, 0110U004467 , R & D reports Title Research of processes of degassing and decline of durability of sandstones by hydrodynamic influence through mining holes popup.stage_title Head Sofiyski Konstantin Konstantinovich, Доктор технічних наук Registration Date 01-09-2010 Organization Institute of Geotechnical mechanics of NAS of Ukraine popup.description2 Report about SRW: 149 p., 23 fig., 11 tabl., 10 applications. A research object is the tensely-deformed state of the coal and pedigree array saturated by gas. The purpose of work is working off the parameters of hydrodynamic influence for degassing and diminishment of durability of sandstones. The methods of researches are analytical, laboratory experiment, mine experiment, statistical treatment. Hydrodynamic influence on sandstone of l1Sl21 through a 31 technological mining hole, bored during 960 м, long from 60 м of to 175 м brought to additional diminishment of durability of sandstone of l1Sl21 on areas of 13 east and western lavas of layer l1, which consisted in development of existent cracks in an array as a result of festering in them of water to 3 MPa, that was instrumental in development of cracks and breach of water on these cracks in making, whereupon pressure in a mining hole fell to 0 MPa. Thus on the most tense areas of roof there were kicks and cod in an array, squeezing out of coal and lowering of rocks of roof. At the conduct of cleansing works in the area of hydrodynamic treatment, including at crossing of tectonic violation with the coulisse of rocks of roof and soil, complications of mountain-technical terms are not occasion. The mathematical model of dependence of gradient of pressure is developed in an array from time of upcast of pressure at pneumatic-hydrodynamic influence and the program for its numeral decision is made. In two months after ending of pneumatic hydrodynamic influence the intensive selection of gas from the superficial decontamination mining hole Щ-1355 began. Speed of gas make from a mining hole changed within the limits of 3,17-6,97 м/s, and pressure in a mining hole - from 0,18 MPa to 0,62 MPa. The debit of mining hole changed from a 4 thousand м3/day of a to 1,8 thousand м3/day. A mining hole was connected to the decontamination gas pipeline and works to today. On today its debit makes about 1 thousand м3/day. Concentration of methane in a stream - 100%. In times of work of the mining hole Щ-1355 from her more than 1,8 million м3 clean methane is extracted. Pneumatic-hydrodynamic influence allows to create in an zone round a mining hole a steady filtration volume able to transport a plenty of gas in a mining hole, is special at the conduct of works under her and settling of rocks of roof. Job performances can be used for prevention of the sudden troop landings and industrial output of methane of coal deposits. DEGASSING, DIMINISHMENT OF DURABILITY, HYDRODYNAMIC INFLUENCE, SUDDEN TROOP LANDINGS, PNEUMATIC-HYDRODYNAMIC INFLUENCE, DECONTAMINATION MINING HOLE, POROSITY, GAS-PENETRABILITY, SELECTION OF GAS, DEBIT OF METHANE, DESORBTION. Product Description popup.authors Барадулін Євген Григорович Власенко Василь Вікторович Косолапова Катерина Дмитрівна Криворучко Олена Никіфорівна Мучник Емілія Ісааковна Нечитайло Валерій Олександрович Опришко Юрій Сергійович Петух Олександр Петрович Силін Дмитро Павлович Софійський Костянтин Костянтинович Черніква Раіса Леонівна popup.nrat_date 2020-04-02 Close