Row pile retaining and protecting method for preventing roadway floor heaving

Abstract

The invention discloses a row pile retaining and protecting method for preventing floor heaving, which comprises three steps as follows: using an air drill to evenly drill a plurality of drill holes with certain distances at the bottom corners on two sides of a roadway respectively, and ensuring that the distances between adjacent drill holes are equal; after hole drilling, inserting a steep pipe of which the diameter is smaller than that of the drill holes and the length is deeper than the depths of the drill holes into each drill hole, and filling grout into the steel pipes after the steep pipes are inserted, and completely filling concrete between the steel pipes and drill holes; after filling, using a W-steel belt to connect and fix the steel pipes at a section of each steel pipe, which excesses the depths of the drill holes, fixing the steel pipes into the drill holes at the upper parts of steel pipes by using nuts and trays, and connecting all steel pipes together to form a support pile for firming and protecting a bottom plate together. According to the invention, all the support steel pipes are connected together to form a row pile for bearing together, the protecting capability for the bottom plate of the roadway can be enhanced, meanwhile, equipment and process are simplified, the cost is lowered, the placing effect is better, and more security and practicability are ensured.

Description

technical field [0001] The invention relates to a support method, in particular to a pile row support method for preventing roadway bottom heaving. Background technique [0002] As my country's coal mines continue to go deep, the roadway floor drum phenomenon is becoming more and more common and serious, which seriously affects the transportation and normal use of such roadways, and affects the safe production of coal mines. Simultaneously, the roadway bottom drum needs a large amount of maintenance work, wastes manpower and material resources and needs to spend a large amount of maintenance costs. At present, the occurrence of roadway floor heaving is often controlled by bottom angle bolts. This method is cumbersome to operate, requires a lot of manpower and material resources, has poor protection effect, and has a short service life. Contents of the invention [0003] In order to solve the deficiencies in the above problems, the present invention provides a pile row sup...

AI Technical Summary

Problems solved by technology

At the same time, the floor drum of the roadway needs a lot of maintenance work, which wastes manpower and material resources and costs a lot of maintenance costs.

At present, the bottom angle bolt is often used to control the occurrence of roadway floor heaving. This method is cumbersome to operate, requires a lot of manpower and material resources, has poor protection effect, and has a short service life.

Images