Construction technology of macromolecule grouting material to control the roof fall area of ​​coal roadway

Abstract

The present invention relates to the technical field of roof fall control, in particular to a construction technique for treating roof fall areas of coal roadways with polymer grouting materials, which can improve the safety of coal mine mining and reduce threats to the personal safety of coal mine workers; the steps include the following steps : (1) Set up the skeleton of the false roof protection net; (2) Quickly fill the horsefly; (3) Mark the hole; (4) Drill: Use a pneumatic drill or a pneumatic drill to drill according to the calibrated drilling position and drilling angle Hole treatment: Drill grouting holes with a depth of 6m. The grouting holes are opened from the section of the excavation roadway and spread evenly in one plane. The drilling holes are arranged vertically or obliquely upwards. ~ 7 grouting holes; (5) check the quality of the drilling; (6) install the grouting drill pipe; (7) seal the hole; (8) prepare the grout: prepare Goodlong chemical grout and move it to the place of use ; (9) Turn on the pump for grouting; (10) Diffusion and solidification; (11) Check the quality of grouting; (12) Acceptance.

Description

technical field [0001] The invention relates to the technical field of roof fall treatment, in particular to a construction technique for treating a roof fall area of ​​a coal roadway with a polymer grouting material. Background technique [0002] Roof fall refers to the natural collapse of the upper mine rock layer in underground mining. It is caused by the destruction of the original balanced mine pressure after mining. There are many reasons for the roof fall accident. As a result of the activity, the mine pressure of the roof deforms to varying degrees during the mine pressure activity. First, cracks appear along the roof joints, resulting in layer separation. At this time, if the roof is not properly protected, the support quality is not good, the pressure continues to increase, and the rock If the deformation exceeds the limit of elastic deformation, there will be fracture, collapse, slab or partial roof fall. From the analysis of the causes of roof fall accidents, som...

AI Technical Summary

Problems solved by technology

[0002] Roof fall refers to the natural collapse of the upper mine rock layer in underground mining. It is caused by the destruction of the original balanced mine pressure after mining. There are many reasons for the roof fall accident. As a result of the activity, the mine pressure of the roof deforms to varying degrees during the mine pressure activity. First, cracks appear along the roof joints, resulting in layer separation. At this time, if the roof is not properly protected, the support quality is not good, the pressure continues to increase, and the rock If the deformation exceeds the limit of elastic deformation, there will be fracture, collapse, slab or partial roof fall. From the analysis of the causes of roof fall accidents, some of them are due to insufficient understanding of objective things, while most are caused by poor on-site management. In the process of coal mine mining, roof fall accidents often occur, which will pose a great threat to the personal safety of coal mine workers. The existing treatment method is often to deal with the board from the two ends of the roof fall to the middle, but the safety of this method lower sex