Water-rich fault fracture zone collapsed roadway repairing method based on angle-variable umbrella-shaped advancing grouting

Abstract

The invention discloses a water-rich fault fracture zone collapsed roadway repairing method based on angle-variable umbrella-shaped advancing grouting. The method includes the following steps of firstly, forming water detection and water guiding drilled holes; secondly, conducting grouting; thirdly, forming water blocking and reinforcing sealing drilled holes row after row in advance; fourthly, sequentially conducting drilled hole grouting row after row; fifthly, arranging a pipe-shed support in advance; sixthly, withdrawing a broken support, conducting excavation on caved gangue; seventhly, temporarily supporting a deformation area through U-shaped steel; eighthly, conducting reinforced concrete lining pouring construction, and embedding a grouting pipe; ninthly, additionally arranging hole patching grouting rows, and sequentially conducting advancing supporting, temporary supporting and one-time supporting till passing through a collapsed area; tenthly, conducting high-pressure grouting filling reinforcing behind the wall through the embedded grouting pipe. The method is an effective method for reinforcing collapsed roadway surrounding rock through grouting and water blocking, and a system control and continuing method is adopted based on the method. On the basis, due to the surrounding rock control engineering practices, on-site roadway repairing blindness can be reduced, and long-term stability of the roadway can be ensured.

Description

Technical field [0001] The invention relates to the field of mines, in particular to a support method for repairing the rear lane of a collapsed roadway in a water-rich fault fracture zone. Background technique [0002] The two disks of the fault generate relative motion under the action of geological structure, and the upper and lower disks squeeze or stretch each other, causing the rocks near the fault to rub and crush, forming a fracture zone roughly parallel to the fault plane, called a fault fracture zone. Fault activity may lead to water-rich rock formations and water-resistant rock formations, breaking the original closed water environment, and forming water-rich fault fracture zones. The existence of water-rich fault fracture zone seriously threatens the safety of roadways and working faces. Before the construction of the coal mine, the structure and hydrogeological conditions within the mining area should be detected first. [0003] The general rock mass in the soft rock ...

AI Technical Summary

Problems solved by technology

For the collapsed roadway, if the deformed support is removed blindly, it will cause secondary slippage of the water-rich loose and broken rock mass, the height of the caving guide rise will increase, and the broken area of ​​the surrounding rock will further increase, which will bring great harm to the roadway maintenance in the later stage. difficulty

Due to the severe water gushing in the collapsed area, coupled with the uncertain location of the water source in the water-rich fractured zone, the construction equipment cannot be arranged, and the roadway repair work is extremely difficult to carry out, and the collapsed area is located in the excavated space, the conventional tunnel face curtain grouting method cannot be constructed. It will be difficult to achieve the purpose of surrounding rock control in the way of slurry water blocking

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