SU943402A1

SU943402A1 - Method of protecting preparatory mine workings

Info

Publication number: SU943402A1
Application number: SU772513473A
Authority: SU
Inventors: Шабдан Абдул-Гаппарович Болгожин; Генри Дмитриевич Лезин; Тулебай Мукаевич Мукаев; Тлеукан Каирович Ищанов
Original assignee: Институт Горного Дела Ан Казсср
Priority date: 1977-07-21
Filing date: 1977-07-21
Publication date: 1982-07-15

Description

(54) СПОСОБ ОХРАНЫ ПОДГОТОВИТЕЛЬНЫХ ГОРНЫХ ВЫРАБОТОК(54) METHOD FOR PROTECTING PREPARATORY MINING WORKS

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Изобретение относитс к горному делу, а именно к охране подготовительных выработок угольных шахт и может быть использовано при поддержании пластовых выработок в услови х высокого горного давлени .The invention relates to mining, in particular to the protection of preparatory workings of coal mines and can be used to maintain reservoir workings under conditions of high mining pressure.

Известен способ охраны пластовых подготовительных выработок, основанный на повышении несуш,ей способности краевой части массива угл , прилегаюшей к выработке , сушность которого заключаетс в том, что упрочнение пласта производ т цементными растворами или синтетическими смолами 1.The known method of protecting reservoir preparatory workings, based on increasing the hedges, is the ability of the marginal part of the coal mass adjacent to the mine, the drying of which lies in the fact that the formation is hardened with cement mortars or synthetic resins 1.

Недостаток его заключаетс в том, что в услови х большого опорного давлени на больших глубинах разработки угольных пластов вл ютс недостаточно надежными, так как несмотр на упрочнение краевой части массива угл , она не выдерживает горного давлени и, деформиру сь, создает крайне неблагопри тные услови дл поддержани выработки.Its disadvantage lies in the fact that under the conditions of a large bearing pressure at great depths, the coal seams are not reliable enough, because, despite the hardening of the edge part of the coal mass, it does not withstand rock pressure and, deformed, creates extremely unfavorable conditions maintain production.

Известен также способ охраны подготовительных горных выработок, включающий бурение по пласту разгрузочных скважин большого диаметра 2.There is also known a method for the protection of preparatory mine workings, which includes drilling a large-diameter discharge wells 2.

Недостатком данного способа вл етс его невысока надежность в устойчивости краевой части массива, поскольку после использовани резерва податливости пласта, т. е. после того как пустоты, образованные скважинами, будут ликвидированы, происходит усиленна деформаци пласта в сторону выработки, и как следствие, разрушение ее крепи.The disadvantage of this method is its low reliability in the stability of the edge part of the array, because after using the reservoir compliance reserve, i.e., after the voids formed by the wells are eliminated, the formation is deformed in the direction of production, and as a result, its destruction lining.

1Дель изобретени - повышение устойчивости подготовительных горных выработок1 of the invention - improving the sustainability of preparatory mine workings

Поставленна цель достигаетс тем, что в скважинах размещают отрезки леса, которые соедин ют между собой металлическими скобами.This goal is achieved by placing wood sections in the wells, which are interconnected with metal clips.

На чертеже изображена горна выработка и прилегающий массив, поперечный разрез.The drawing shows the hearth production and adjacent array, cross-section.

Способ осуществл етс следующим образом .The method is carried out as follows.

Claims

In the vertical section of the coal seam 1, lining of preparatory excavation 2 is installed. From the drift through the reservoir we drill 3 large diameters, into which forest 4 sections prevent, by successively connecting them to each other with metal brackets 5. Under the action of the reference rock pressure, vertical deformation occurs reservoir, weakened by wells 3. In connection with this, the maximum of the reference pressure is transferred deep into the array. Further deformation of the marginal part of the reservoir continues due to the transverse see of the tree inside the wells. At the same time, the force of adhesion of coal with wood m reaches a considerable value. It is known that the temporary resistance of a tree to stretch several times the temporary resistance of a tree to transverse compression. Thanks to this, while maintaining the vertical compliance of the formation, the extrusion of the coal towards the outcropping of the formation will be prevented. The effectiveness of the proposed method lies in the fact that due to the introduction of forest boreholes, lateral deformations of the rear sight are reduced, depending on the magnitude of the rock pressure, by more than 2 times. With a vertical deformation of the reservoir by 20–30% of its thickness, the carrying capacity of the coal mass with the proposed method is approximately 2 times higher than with the method with discharge wells without a forest. Claims The method of protecting preparatory mine workings, including drilling through a reservoir of large-diameter discharge wells, characterized in that, in order to increase the sustainability of preparatory mine workings, forest sections are placed in the wells, which are interconnected with metal clips. Sources of information to be taken into account in the examination 1. M. Komissarov, et al. Investigation of the method of guarding inclined workings by decomposing the host rock mass through coal wells at the mine of the 15 “Shakhterskantratsit” Coal, 1968, No. 3.

2. Glushko V. T. and others. Protection of the workings of deep schacht. M., "Nedra, 1975, p. 46 (prototype).