Anchoring method for bottom plate of coal mine roadway
An anchoring method and technology for coal mine roadway, applied in the direction of tunnel, tunnel lining, installation of bolts, etc., can solve the problem of repeated repair of roadway, and achieve the effect of avoiding repeated repair, good use effect and convenient realization.
Active Publication Date: 2016-08-24
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology
[0007] The purpose of the present invention is to provide an anchoring method for the bottom plate of coal mine roadway, which has simple procedures and convenient operation, optimizes the lithology of the bottom plate through grouting and prestressed anchor cables, improves the mechanical environment of the bottom plate, forms a pressure-bearing arch structure of the bottom plate, and shields the bottom plate of the roadway The destructive effect of the load can effectively solve the problem of serious deformation of the roadway floor under complex geological conditions, avoid repeated roadway repairs, and reduce roadway maintenance costs
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Embodiment Construction
[0039] See Figure 1-2 , Shows the anchoring method for the coal mine roadway floor of the present invention.
[0040] The anchoring method for the floor of the coal mine roadway includes the following steps:
[0041] Step 1: Dig and dig a number of parallel reverse arched trenches 3 on the floor of the roadway 2;
[0042] Wherein, the inverted arch groove 3 is semi-elliptical and is arranged perpendicular to the axis of the roadway. In some preferred embodiments, the width is about 300-500 mm.
[0043] Step 2: Set a plurality of anchor cable boreholes perpendicular to the arc at the bottom of the groove 3 in the reverse arched groove 3, and lower the hollow grouting anchor cable 8 with the grouting pipe 7 in each anchor cable borehole. And seal the hole. The pressure-bearing arch structure 5 of the bottom plate is formed by grouting and anchor cable prestressing. It is also necessary to set a braid at a distance from the orifice to the bottom of the hole and use a cementitious mater...
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The invention discloses an anchoring method for the bottom plate of a coal mine roadway, which forms a pressure-bearing arch structure on the roadway bottom plate through anchoring support to prevent the bottom of the roadway from heaving, and is suitable for coal mine roadway support engineering. The basic steps are: after the roadway excavation is completed and the roof support is applied, an inverted arch groove perpendicular to the direction of the roadway axis is excavated on the roadway floor, and a grouting anchor cable perpendicular to the anti-arch arc is constructed in this groove. A pressure-bearing arch structure is formed within the influence range of the anchor cable interaction. The arch foot of the pressure-bearing arch structure acts within the stable range of the two sides of the roadway, which can shield the load of the roadway floor and effectively control the deformation of the roadway floor.
Description
Technical field [0001] The invention relates to a method for controlling the deformation of the floor of a coal mine roadway, in particular to an anchoring method for the floor of a coal mine roadway that avoids the violent deformation of the floor of the coal mine roadway engineering. Background technique [0002] As a form of mine pressure, the floor heave of roadway generally occurs in deep roadways, roadways with poor floor lithology, and roadways affected by mining. A large amount of measured data shows that the floor heave of the roadway can account for 2 / 3 to 3 / 4 of the approaching amount of the roof and floor of the roadway. At the same time, the stability of the floor significantly affects the deformation and destruction of the two sides and the roof. If the floor heave of the roadway is not effectively controlled, it will not only significantly increase the maintenance cost of the roadway, but also affect the normal production of the mine. At present, the methods of co...
Claims
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IPC IPC(8): E21D11/00E21D20/02
Inventor 陈盼张幼振姚克邵俊杰李旭涛蔺志涛
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP