Coal mine underground roadway cross tiling supporting structure

Abstract

The utility model provides a coal mine underground roadway cross tiling supporting structure, which belongs to the technical field of coal mine supporting, and comprises the following steps: firstly, determining the intersection position of a coal roadway and a rock roadway, then cutting grooves in two sides of a coal roadway bottom plate, densely laying steel supports, pouring concrete with the same height as the coal roadway bottom plate after laying, and forming a pressed whole by the steel supports and the coal roadway bottom plate. The method can effectively reduce the influence of the overall mine pressure appearance and coal seam mining of the upper coal roadway at the intersection of the coal roadway and the rock roadway on the lower rock roadway, and solves the problem that the roof of the lower rock roadway sinks along with roof separation crushing and roadway deformation.

Description

Technical Field

[0001] The utility model belongs to the technical field of coal mine support, and specifically discloses a cross-paving support structure for underground coal mine tunnels. Background Art

[0002] At present, when underground coal mines pass through coal lanes of different layers and intersect with lower rock lanes (bottom extraction lanes), the usually adopted solution is to pass through the coal lanes directly, and construct reinforced channel steel anchor cables or single columns in the lower rock lanes (bottom extraction lanes) as strengthened support to control the deformation of the rock lane roof. Affected by the overall mine pressure of the upper coal lane and the mining of the coal seam, the roof of the lower rock lane sinks and breaks, the side pressure of the lane wall is large, the bulging of the lane wall is serious, the support fails, and the serious deformation of the rock lane tunnel directly causes the ventilation section to become smaller, affecting the ventilation section of the lane. In order to maintain the stability of the rock lane roof at the intersection, multiple lane repairs and maintenance are required, wasting a lot of manpower, material and financial resources. Utility Model Content

[0003] The utility model provides a cross-paving support structure for underground coal mine tunnels to improve the problem that when the coal tunnel and the rock tunnel intersect, the overall mine pressure of the upper coal tunnel and the influence of coal seam mining cause the roof of the lower rock tunnel to sink, accompanied by roof separation and crushing and tunnel deformation.

[0004] The above-mentioned cross-paved support structure of the underground coal mine tunnel includes a support trough, steel supports and a concrete layer; the support trough is set at the intersection of the coal tunnel and the rock tunnel and is located on both sides of the coal tunnel floor, and the length of the support trough is greater than the width of the rock tunnel; the steel supports are laid in the support trough, and the steel supports are connected to the inner wall of the support trough; the concrete layer is poured between the support trough and the steel supports and on the upper surface of the steel supports, and the concrete layer poured on the upper surface of the steel supports is at the same height as the coal tunnel floor.

[0005] In the above-mentioned cross-paved support structure of the coal mine underground tunnel, the steel support includes a plurality of steel beams arranged in sequence in a direction perpendicular to the coal tunnel, and the length direction of the steel beams is parallel to the direction of the coal tunnel.

[0006] In the above-mentioned cross-paved support structure of the underground coal mine tunnel, the steel beam is an I-beam.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] By adopting the above-mentioned cross-paving support structure for underground coal mine tunnels, the intersection position of the coal tunnel and the rock tunnel is first determined, and then steel supports are densely laid on both sides of the coal tunnel floor by cutting grooves. After laying, concrete is poured at the same height as the coal tunnel floor. The steel supports and the coal tunnel floor form a compressed whole, which can effectively reduce the overall mine pressure of the upper coal tunnel at the intersection of the coal tunnel and the rock tunnel and the impact of coal seam mining on the lower rock tunnel, and improve the problem of sinking of the roof of the lower rock tunnel accompanied by roof delamination and crushing and tunnel deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 This is a plan view of the stratigraphic relationship at the intersection of the rubber wheel roadway (coal roadway) in the fifth panel area and the 5303 bottom extraction roadway 1 (rock roadway);

[0011] Figure 2 This is a structural diagram of the cross-paved support structure of underground coal mine tunnels.

[0012] In the figure: 1-support groove; 2-steel support;

[0013] 101-coal lane; 102-rock lane. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meanings understood by people with ordinary skills in the field to which the present invention belongs.

[0015] The words "first", "second" and similar terms used in the specification and claims of this utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprises" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0016] Example 1

[0017] This embodiment provides a cross-paved support structure for underground coal mine tunnels, including a support trough 1, steel supports 2 and a concrete layer; the support trough 1 is arranged at the intersection of the coal tunnel 101 and the rock tunnel 102 and is located on both sides of the coal tunnel floor, and the length of the support trough 1 is greater than the width of the rock tunnel 102; the steel supports 2 are laid in the support trough 1, and the steel supports 2 are connected to the inner wall of the support trough 1; the concrete layer is poured between the support trough 1 and the steel supports 2 and on the upper surface of the steel supports 2, and the concrete layer poured on the upper surface of the steel supports 2 is at the same height as the coal tunnel floor to facilitate vehicle travel.

[0018] In the above-mentioned cross-paved support structure of the coal mine underground tunnel, the steel support 2 includes multiple steel beams arranged in sequence in a direction perpendicular to the coal tunnel 101. The length direction of the steel beam is parallel to the direction of the coal tunnel, so that the steel beam is subjected to force along the length direction, making the overall deformation resistance of the steel support 2 stronger.

[0019] In the above-mentioned cross-paved support structure of the underground coal mine tunnel, the steel beam is an I-beam.

[0020] Example 2

[0021] This embodiment takes the intersection of the five-panel rubber-wheeled roadway (coal roadway) and the 5303 bottom extraction roadway 1 (rock roadway) at different levels in a coal mine owned by the applicant as an example to provide a detailed explanation of the cross-paving support structure of the underground coal mine roadway.

[0022] The net width of the rubber wheel lane in the Wupan area is 5.6 meters and the net height is 4.3 meters. The net width of the 5303 bottom extraction lane 1 is 4.8 meters and the net height is 3.2 meters. The distance between the two lanes is 8.5 meters.

[0023] Above the roof of 5303 bottom extraction 1 lane, dense supporting I-beams are laid on both sides of the floor of the rubber wheel lane in the Wupan area. After laying, concrete is poured to the same height as the floor. During the laying of the I-beams, both ends of the I-beams must exceed the width of the lower 5303 bottom extraction 1 lane by 1.5 meters. The purpose is to reduce the overall mine pressure at the upper part of the intersection and the influence of coal seam mining, which may cause the roof of the lower 5303 bottom extraction 1 lane to sink, accompanied by roof delamination and deformation of the lane.

[0024] Densely laid 25A I-beams can be reused.

[0025] Based on past experience, reinforcement is required for the 10 meters before and after the 5303 bottom extraction lane 1 at the lower part of the intersection. Due to dynamic pressure, the bottom extraction lane requires at least two reinforcements. Reinforcement of the 5303 bottom extraction lane 1 roof requires two 2-meter-long channels per meter, costing 125 yuan per meter. The cost of the reinforcing I-beam per meter is 125 x 4 = 500 yuan. Four 6.3-meter top anchor cables are required per meter, costing 261 x 4 = 1004 yuan. Three 5-meter-long steel meshes are also required per meter, costing 25 yuan per square meter, for a total cost of 25 x 5 = 125 yuan. The total cost of reinforcing the 25-meter 5303 bottom extraction lane 1 roof twice is (500 + 1004 + 125) x 25 x 2 = 81,450 yuan. At present, according to the calculation of 10 intersection points between the rubber-wheeled tunnel (coal tunnel) in Wupan District and the 5303 bottom extraction tunnel 1 (rock tunnel), the use of cross-paving support structure in underground coal mine tunnels can save a total of 814,500 yuan per year.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cross-paving support structure for underground coal mine tunnels, characterized in that: Includes support channels, steel supports and concrete layers; The support groove is arranged at the intersection of the coal roadway and the rock roadway and is located at both sides of the coal roadway floor. The length of the support groove is greater than the width of the rock roadway. The steel support is laid in the support groove, and the steel support is connected to the inner wall of the support groove; The concrete layer is poured between the support trough and the steel support and on the upper surface of the steel support. The concrete layer poured on the upper surface of the steel support is at the same height as the coal roadway floor.

2. The cross-tiled support structure for underground coal mine tunnels according to claim 1, characterized in that: The steel support includes a plurality of steel beams arranged in sequence in a direction perpendicular to the coal roadway, and the length direction of the steel beams is parallel to the direction of the coal roadway.

3. The cross-paving support structure for underground coal mine tunnels according to claim 2, characterized in that: The steel beams are made of I-beams.

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