SU1089265A1 - Method of protecting mine workings for water break-ins - Google Patents

Abstract

METHOD OF PROTECTION OF MINING EMISSIONS FROM WATER BREAKTHROUGH when developing coal seams with underwater objects, including leaving the pillar of coal in the developed space when mining the reservoir in the supine wing of a rupture tectonic disturbance, the mixer surface of which goes under the water body, which has that, in order to reduce the loss of coal in the subsoil, the reservoir development is carried out in two sections, and when the reservoir is developed towards the surface of the mixer, first, the section of the reservoir that is located beyond lamy adjacent to the surface of the displacement section, having a width determined from the expression e Hgctgco, where Hg - safe depth of the reservoir under the water body, Mj CO - the angle between the plane of the reservoir and the surface of the displacer, degree. and after the termination of rocks displacement over the developed space of the initially exhausted section and when the displacer reaches the surface section of the displacer above this space, the working area adjacent to the surface of the mixer is satisfied, the condition of the coal rear sight, m; And determined from the relation cin L –li 5inq) co5 ft where C is the displacement angle at the section, (L perpendicular line of intersection of the formation with the surface between the surface of displacements and the bottom of the water body, hail; Corner: uLj- length of the surface section o: l displacer on the cut perpendicular line crossing} and the reservoir with the surface between the upper boundary of the surface of the mixer located in the zone of complete displacements and the point of intersection nor this surface with the sole of the water object, m, “a. when mining the reservoir from the surface of the mixer, first work adjacent to the top

Description

the displacer area of width El, determined from the ratio

e2- | p-gt-

) cos 03,

64P cpcos p1

where P is the distance in a section perpendicular to the line of intersection of the reservoir with the surface of the displacer, between the intersection points of the surface of the mixer with the development reservoir and the bottom of the water body, then the remaining part is processed

after the formation of the reservoir after the} overhaul of displacement of rocks over the mined-out area of the initially spent area and the section of the mixer surface reaching the zone | Full displacement by) this space is 2dn wide, provided that the distance between the reservoir being developed and the upper limit the surface area of the mixer that falls into the zone of complete displacements is at least I g.

The invention relates to the mining industry and is intended to protect the mine workings from water breakthroughs when developing flat and inclined coal seams under water bodies.

There is a method of protecting the mine workings from water breakthroughs when developing coal seams under water bodies, including leaving the pillar of coal in the developed space during mining of the reservoir in the recumbent tectonic disturbance, the mixer surface goes under the water body. However, the known method is characterized by significant losses coal

The purpose of the invention is to reduce the loss of coal in the depths.

The goal is achieved by the fact that according to the method of protecting the mine workings from water breakthroughs when developing coal seams under water bodies, including leaving the pillar of coal in the developed space when mining the reservoir in the supine wing of a rupture tectonic disturbance, the surface of the displacer goes under the water body two sections, and during the development of the reservoir in the direction of the surface of the displacer, first work out the section of the reservoir located outside the adjacent the surface of the mixer section having a width of 2, determined from the expression

Br-Hsct,

where not - the depth of reservoir development under the water object is safe, m,

(j is the angle between the plane of the reservoir and the displacement surface, degree,

and testing of the area adjacent to the surface of the displacer, is performed after the rocks are displaced over the developed space of the initially spent area and the displacement surface reaches over the space of this space L of width satisfying the condition

,,.

 - The width of the coal pillar, m | and determined from the ratio

dn

-.one,

L inqjcos fi

de (| - displacement angle in a section perpendicular to the line of intersection of the formation with the surface between the displacement surface and the bottom of the water body, deg.

P-angle between the line of intersection of the reservoir with the surface of the displacer and the bottom of the water body, deg .; uL is the length of the section of the mixer surface in a section perpendicular to the line of intersection of the formation with the surface between the upper boundary of the surface of the displacer located in the zone of complete

Claims (1)

METHOD FOR PROTECTING MINING PRODUCTS FROM WATER BREAKTHROUGH during the development of coal seams by underwater objects, including leaving the coal pillar in the worked out space while mining the seam in the lying bed of a discontinuous tectonic disturbance, the mixer surface of which goes under the water body, the fact that, in order to reduce coal losses in the subsoil, the formation is mined in two sections, and when mining the seam towards the surface of the mixer, the section of the seam located outside shifter portion adjacent to a surface having a width determined from the expression where Wg ~ safe depth reservoir development under aqueous object, m; СО is the angle between the plane of the reservoir and the surface of the mixer, degrees, and the development of the area adjacent to the surface of the mixer is carried out after the displacement of rocks over the worked-out space of the initially worked-out area and reaching the area of the surface of the mixer above this space of width L, satisfying the condition where <^) | - the width of the coal pillar, m *, And determined from the relation <oin ipcos ρ where Ср is the angle of the displacer in the section perpendicular to the line of intersection of the formation with the surface between the displacer surface and the bottom of the water body, deg ,; ft - angle between the line of intersection of the formation with the surface of the mixer and the bottom of the water body, deg .; L is the length of the segment of the surface of the mixer in the section perpendicular to the line of intersection of the formation with the surface between the upper boundary of the surface section of the mixer, located in the zone of complete displacements, and the point of intersection of this surface with the sole of the water body, m, m; a. when working out the formation in the direction from the surface of the mixer, first work adjacent to the surface> of the displacement of the mixer, a section of width ^ "determined from the relation θ2 ⁼ (Р ~ Р · СОЗ ^ω ,. \ 6αη Ср cos pl 'where Р is the distance at the section perpendicular to the line of intersection of the formation with the surface of the mixer, between the points of intersection of the surface of the mixer with the developed formation and the sole of the water body, Mj then work out the rest of the formation after the end of the rock movement over the worked-out area of the initially worked out area and reaching the mixer’s surface that falls into the | Full displacement above with a width of 2dm, provided that the distance between the reservoir being developed and the upper boundary of the surface section of the mixer falling into the zone of full displacements is not less than