SU877071A1

SU877071A1 - Method of degassing coal beds

Info

Publication number: SU877071A1
Application number: SU802870266A
Authority: SU
Inventors: Леонид Николаевич Гапанович; Сергей Федорович Попов; Александр Васильевич Савостьянов; Альберт Андреевич Чурилов; Евгений Францевич Козловчунас
Original assignee: Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Институт Горного Дела Им. А.А.Скочинского
Priority date: 1980-01-11
Filing date: 1980-01-11
Publication date: 1981-10-30

Description

Изобретение относится к горнодобывающей промышленности и может быть использовано при разработке незащищенных выбросоопасных угольных пластов.The invention relates to the mining industry and can be used in the development of unprotected outburst coal seams.

Известен способ дегазации шахтных полей, заключающийся в проведении на вынимаемом поле газоотсасывающий скважин и проведении в плоскости разра- , батываемого пласта смежного выемоч-* , ного поля сбоечных дренажно-транспорт-¹ных скважин, которые подсоединяют с одной стороны к магистральному газопроводу, а с другой - К устьям газоотсасывающих скважин, при этом оДной системой скважин ведут отсос газа на «5 2-х последовательно отрабатываемых ' полях ' J1} .There is a known method of degassing mine fields, which consists in conducting gas-sucking wells on a field to be taken out and conducting an adjacent excavation * field in the plane of a developed, worked-out formation of faulty drainage-transport wells ¹ , which are connected on one side to the main gas pipeline and the other - To the mouths of gas suction wells, while ONE well system leads to gas suction at “5 2 sequentially worked out 'fields' J1}.

Недостатком данного способа является трудность его применения на выбросоопасных пластах.The disadvantage of this method is the difficulty of its application on outburst formations.

Известен также способ дегазации угольных пластов, включающий предварительное бурение в угольный пласт длинных параллельно-одиночных дегазационных скважин, пробуренных в угольный пласт параллельно;линии очистного забоя из выемочной выработки, герметл зацию их и отвод газа из угольного .пласта [2}.There is also a known method of degassing coal seams, including pre-drilling into a coal seam of long parallel-single degassing wells drilled into the coal seam in parallel; the faces of the face from the excavation, sealing them and removing gas from the coal seam [2}.

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Недостатком этого способа является его относительно невысокая эффективность при использовании его на незащищенных противовыбрйсными мероприятиями выбросоопасных угольных пластах.The disadvantage of this method is its relatively low efficiency when used on unprotected anti-blowout measures of outburst coal seams.

Цель изобретения -' повышение эффективности дегазации незащищенных лротивовыбросными мероприятиями выбросоопасных тонких и средней мощности угольных пластов при отработке их полосами по падению-восстанию.The purpose of the invention is' to increase the efficiency of degassing of unprotected counter-blowout measures of outburst-hazardous thin and medium power coal seams during mining by strips of fall-uprising.

Поставленная цель достигается тем, что из выемочной выработки в кровлю угольного пласта подготавливаемой к отработке полосы, смежной с отрабатываемой полосой, последовательно бурят взрывные скважины, производят локальную разгрузку угольного-пласта от горного давления путем торпедирования взрывных скважин, а каждую последующую дегазационную скважину бурят непосредственно под взрывной сква·' жиной После торпедирования взрывной скважины вслед за подвиганием очистного забоя отрабатываемой полосы, при этом каждую дегазационную скважину бурят за зону опорного давления,' возникающую в результате ведения очистных работ в отрабатываемой полосе, причем каждую дегазационную скважину последующей полосы бурят в оставшуюся часть дегазационной скважины предыдущей полосы.This goal is achieved by the fact that blast holes are drilled sequentially from a coal seam excavation into the roof of the strip being prepared for mining, adjacent to the strip to be drilled, the coal-seam is unloaded locally from rock pressure by torpedoing of the blast holes, and each subsequent degassing well is drilled directly underneath blasting hole · 'with life' After torpedoing of a blasting hole following the movement of the working face of the worked strip, each degassing well y is drilled for the reference pressure zone 'occurring as a result of extraction works fulfills a band, wherein each band degassing hole is drilled subsequent to the rest of the previous degassing wells strip.

На фиг. 1 представлена принципиальная Схема дегазации пласта параллельными скважинами при его разработке полосами по падению; на фиг. 2 схема расположения взрывных и дегазационных скважин.In FIG. 1 is a schematic diagram of the degassing of a formation by parallel wells during its development by dip strips; in FIG. 2 layout of blasting and degassing wells.

Способ заключается в следующем.The method is as follows.

Дегазационные работы ведут на выемочном участке, подготовленном полевыми погоризонтными вентиляционным 1 и конвейерным 2 штреками с примыкающими к очистному забою 3 выемочными выработками, конвейерным 4 и вентиляционным 5 бремсбергами, из последнего бурят в кровлю пласта 6 для торпедирования пород взрывные скважины 7 и в угольный пласт 8 дегазационные скважины 9, в процессе проведения которых производят перебуривание зоны опорного давления 10, образующейся в краевой части массива угля. При этом дегазационные скважины проводят непосредственно под взрывными сразу же после их взрывания и торпедирования кровли с целью локальной разгрузки пласта от горного давления. Бурение дегазационных скважин производят на участке, прилегающем к отрабатываемой полосе, после подвигания очист-30 ного забоя, причем дегазационные скважины забуривают по полостям прежних скважин, оставшихся после прохода очистного забоя, что облегчает перебуривание зоны опорного давления. Дегазационные скважины проводят параллельно между собой и линии очистного забоя. Это позволяет извлекать метан и после разгрузки призабойной части пласта от опорного горного давления. Дегазационные скважины бурят на величину, превышающую длину очистного забоя и ширину зоны опорного давления. Предлагаемый способ рекомендуется для дегазации пласта при его отработке полосами по падению-восстаниЬ. ^эИспользование предлагаемого способа дегазации угольных’пластов полезного искбпаемого обеспечивает повышение эффективности дегазации незащищенных противовыбросными мероприятиями выбросоопасных пластов и ,безопасности их разработки.Degassing works are carried out in the excavation section prepared by field horizontal horizontally ventilating 1 and conveyor 2 drifts with 3 excavation holes adjacent to the face of the mine face, conveyor 4 and ventilation 5 Bremsbergs, blasting holes 7 and into coal seam 8 are drilled into the roof of the formation 6 for torpedoing rocks degassing wells 9, during the course of which they drill the reference pressure zone 10 formed in the edge of the coal mass. At the same time, degassing wells are carried out directly under the blast holes immediately after their blasting and torpedoing of the roof with the aim of local unloading of the formation from rock pressure. The degassing wells are drilled in the area adjacent to the working strip after moving the treatment bottom, and the degassing wells are drilled along the cavities of the previous wells left after the treatment bottom, which facilitates the drilling of the reference pressure zone. Degassing wells are conducted parallel to each other and the face of the face. This allows you to extract methane and after unloading the bottom of the reservoir from the reference rock pressure. Degassing wells are drilled by an amount exceeding the length of the working face and the width of the zone of reference pressure. The proposed method is recommended for the degassing of the formation during its development by strips in the fall-uprising. ^The use of the proposed method for the degassing of coal seams of minerals provides an increase in the efficiency of degassing of unprotected blowout-hazardous outburst formations and the safety of their development.

Claims

, : one . The invention relates to the mining industry and can be used in the development of unprotected outburst coal seams. There is a method of degassing mine fields, which consists in carrying out a gas-suction gas field to the extractor: in and out of the field of ampoulement of the submerged stratum adjacent to the excavated field of the failing drainage-transport wells, which are connected from one side to the other. The main gas pipeline, on the other hand, is the gas pumping well, while the well system sucks gas for 2 consecutively working fields DL .. The disadvantage of this method is that it is difficult to apply to outburst formations. A method is also known for the degassing of coal seams, which includes continuous drilling into the coal plate of long parallel-single degassing wells drilled into the coal seam parallel, the cleaning lines from the excavation mine, sealing them and venting the gas from the coal layer 2. It’s barely The method is its relatively low efficiency when used on unprotected blowout preventive measures of coal seams. The purpose of the invention is to increase the efficiency of the degassing of unprotected low-emission measures of outburst-hazardous thin and medium thickness coal seams when working them out with strips of pR to fall-rebellion. The goal is achieved by the fact that from the excavation production into the roof of a coal seam prepared for mining a strip adjacent to the strip being worked, the explosive wells are successively drilled, the coal seam is relieved from the rotary pressure locally by torpedoing the explosive wells. directly under the explosive well riocne torpedo vz1I: 1 in the borehole following the advancement of the clearing downhole of the developed strip, with each degassing well well drilled for the reference pressure zone that occurs as a result of extraction works in fulfills strip. each degassing well of the next strip is drilled to the remaining portion of the degassing well of the previous strip. FIG. Figure 1 shows a schematic diagram of the reservoir degassing of parallel wells when it is developed in the form of falling stripes; in fig. Figure 2 shows the location of blasting and degassing wells. The method is as follows. Decontamination works are carried out at the excavation site, prepared by the field with horizontal ground ventilation 1 and conveyor 2 drifts with 3 excavation workings adjacent to the clearing bottom 3, conveyor 4 and ventilation 5 brembergs, and the last drill into the roof of the formation b Into the coal seam 8, degassing 9, in the course of which the overpressure zone 10 forming in the edge part of the coal mass is produced. At this, degassing wells are conducted directly under the explosives immediately after they blow up and torpedo the roof in order to locally discharge the formation from the rock pressure. The degassing wells are drilled in the area adjacent to the strip to be worked out after clearing the bottom, and the degassing wells are drilled along the cavities of the former wells left after the clearing hole, which facilitates the re-drilling of the reference pressure zone. The degassing wells are parallel to each other and clearing lines. This allows the methane to be recovered after unloading the bottomhole formation from the reference rock pressure. Degassing wells are drilled by an amount exceeding the length of the cleaning bottom and the width of the reference zone. The proposed method is recommended for the degassing of the reservoir when it is processed by falling strips-recovery. The use of the proposed method of degassing the coal seams beneficially ensures that the degassing of unprotected blowout measures of the outburst formations and the safety of their development are improved. Claims method of coal seam degassing, including preliminary drilling into a coal seam of long parallel single degassing wells drilled in the coal seam parallel to the clearing line of excavation, sealing them and venting gas from the coal seam, characterized in that, in order to increase the degassing efficiency unprotected anti-blowout measures of outburst-hazardous thin and medium-sized coal slabs when working them in strips for a fall-uprising, from the excavation the coal seam prepared to work out the strip adjacent to the strip to be drilled into the roof is sequentially drilled with explosive wells, and the coal bed is unloaded locally from the rock pressure by torpedoing explosive wells following the advancement of the clearing downhole of the developed strip, with each degassing well being drilled beyond the reference pressure zone that occurs during There is no cleaning work in the production strip, with each degassing well of the next strip being drilled into the remaining portion of the degassing well of the previous strip. Sources of information taken into account in the "examination 1. The author's certificate of the USSR No. 608961, cl. E 21 F 7/00, 1974.

2.Sergeev I.V. et al. Efficiency of degassing of the developed seams on deep horizons. M., ZNIEIugol, 1977, p. 14, p. 19 (prototype).