SU1209894A1 - Method of preventing spontaneous outbursts in elevated rock pressure zones - Google Patents

Description

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The invention relates to the mining industry and can be used in the development of outburst coal seams.

 invention - improving the effectiveness of preventing sudden emissions in areas of high mountain pressure (PGD), due to the intensification of gas evolution during degassing.

The blueprint shows a pattern of drilling degassing wells in the zone of increased rock pressure (PGD).

The method is carried out as follows.

The graphical and analytical method on mining plans determines the approximate boundaries of PGD zone 1 of pillars 2 and transfer them to

Within the zone of PGD, the direction of the spread of technogenic cracks 3, formed under the influence of increased rock pressure, and the degree of disturbance of coal are determined. For this, in areas of the reservoir that are located in the PGD zone, developed (worked up) or not affected by the mining of the adjacent layer, macrofracture

Editor E. Papp

Compiled by M.Gagulin

Tehred Oh, Ned Proofreader A..T sko

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VNIIPI USSR State Committee

on affairs of invention and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, Proektna St., 4

09894

coal, systems of technogenic cracks formed under the action of PGD are separated. These cracks are oriented almost normal to the layer and occur only in the PGD zones. The extent of fractures is determined by their position relative to the sinking breast.

With weakly disturbed coal (I-III

0 degrees of disturbance) degassing wells 4 drills from preparatory production 5 in the direction of perpendicular strike of man-made cracks.

15 If there are packs of heavily disturbed coal (IY-Y degree of disturbance) in the reservoir, the reservoir is hydraulically divided by wells 6 drilled in parallel

20 slaughter of lava.

Example. The method was tested at the Karaganda mine when the CGD cleared the working beds of the reservoir from the reservoir K from the reservoir K (thickness is between 15–20 m).

30 cracks increased by 20-30%.

Claims (1)

METHOD FOR PREVENTING SUDDEN EMISSIONS IN THE ZONE OF THE INCREASED MOUNTAIN PRESSURE, including the drilling of degassing wells from S 4 * production workings, their sealing and gas removal from them from the coal seam, characterized in that, in order to increase the efficiency of preventing sudden emissions due to intensification of gas evolution during degassing, the boundaries of the zone of increased rock pressure in the production and the degree of coal disturbance are preliminarily determined it is evaluated makrotreschinovatost coal at sites nadrabotannyh or undermined unaffected by mining seam and adjacent area of increased overburden pressure, systemic isolated _β threads Technogen cracks formed under the influence of increased rock pressure and determine their extent, then degassing wells are drilled into zones of increased rock pressure in the direction perpendicular to the propagation of technogenic cracks, while wells are drilled beyond the boundary of the zone of increased rock pressure.