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Ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method

A technology for crushing coal rock mass and coal rock mass, which is applied in earth-moving drilling, mining equipment, bolt installation, etc., can solve the problems of difficult bolt installation and low anchoring force, and achieves good anchoring effect, convenient operation and economical efficiency. The effect of working time

Inactive Publication Date: 2015-07-01
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0003] In view of the above situation, in order to solve the defects of the prior art, the purpose of the present invention is to provide a soft and broken coal and rock mass drilling and injecting integrated step-by-step grouting method, which can effectively solve the difficulty of bolt installation in the extremely soft and broken coal and rock mass. The problem of low anchoring force

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  • Ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method
  • Ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method

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Embodiment Construction

[0014] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] Depend on Figure 1-8 Provide, the present invention utilizes grouting device, carries out according to the following steps:

[0016] The first step is to drill, connect the drill bit 1 with one end of the first rod body 2, connect the other end of the first rod body 2 with the drill tail 5, insert the hexagonal prism of the drill tail 5 joint into the drill 6 hole, and start the drill 6 Drilling at the set position, when drilling, pass clear water 16 from the rod body, wash the drilling slag through the bottom of the drilling hole, and the mixed solution 17 of drilling slag and water is discharged through the gap between the rod body and the drilling wall (17 is the mixture of drilling slag and water), when the first rod body 2 completely enters the coal rock mass 20, the drill tail 5 is pulled out from the dril...

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Abstract

The invention relates to an ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method and accordingly the problems that the installation of anchor rods is difficult and the anchoring force is small in the ultra-soft cracked coal and rock mass can be effectively solved. According to the technical scheme, the ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method comprises the following steps of step 1, drilling; step 2, hole-sealing grouting; step 3 pressurized grouting through a grouting device. According to the ultra-soft cracked coal and rock mass drill and grouting integrated fractional grouting method, the method is simple, the operation is convenient, the problems that the installation of the anchor rods is difficult and the anchoring force is small when the coal and rock mass is located in the ultra-soft cracked state are effectively solved, the operation time is saved, the good anchoring effect is achieved through different grouting materials in a fractional grouting mode, the rapid supporting of an ultra-soft cracked coal and rock mass roadway is facilitated, and a large innovation is brought to an ultra-soft cracked coal and rock anchoring rod supporting method.

Description

technical field [0001] The invention relates to the field of coal mines, in particular to a step-by-step grouting method for integrated drilling and injection of extremely soft and broken coal and rock mass. Background technique [0002] As a kind of active support, bolt support can effectively improve the mechanical properties of surrounding rock, and has obvious advantages compared with traditional passive support forms. However, it is difficult to effectively control the deformation and failure of the surrounding rock by using bolt support technology for extremely soft and broken coal and rock roadways. The main reasons are: ① Due to the extremely broken surrounding rock, it is difficult to form the bolt hole and the bolt cannot be installed normally. . ②Because the surrounding rock around the hole wall of the anchor bolt is soft and broken, even if the anchor bolt is barely anchored, its anchoring force is far from meeting the design requirements. Scholars at home ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D20/02
CPCE21D20/003E21D20/02
Inventor 张辉程利兴李梦珍刘少伟徐学锋宋勤法姜彦军
Owner HENAN POLYTECHNIC UNIV
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