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Coal mine underground over-broken abnormal zone drilling method

An abnormal and coal mine technology, applied in the direction of drilling equipment and methods, drill bits, drill pipes, etc., can solve the problems of difficult hole formation, hole collapse, and deep hole drilling, so that it is not easy to deviate, The effect of reducing resistance and good slag discharge effect

Active Publication Date: 2011-05-04
HUAINAN MINING IND GRP
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AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method for drilling through the broken abnormal zone in the underground coal mine, which is used to solve the problem that the opening of the coal mine is easy to collapse, difficult to form a hole and difficult to drill deep when the coal mine drilled through the abnormal broken zone in the prior art. To solve the problem of the hole section, realize the hole formation and hole protection of the broken abnormal zone, reduce the resistance of drilling to the deep hole section, and improve the efficiency of drilling the deep hole section

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  • Coal mine underground over-broken abnormal zone drilling method
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  • Coal mine underground over-broken abnormal zone drilling method

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] figure 1 It is a flow chart of the first embodiment of the method for drilling through the broken abnormal zone in the coal mine underground of the present invention, as figure 1 As shown, the method includes the following steps:

[0022] S101, using the first drill bit connected to the core pipe to open a hole, and leaving the core pipe ...

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Abstract

The invention provides a coal mine underground over-broken abnormal zone drilling method. The method comprises the following steps of: forming a hole by adopting a first drill bit connected with a core pipe, and reserving the core pipe in the hole; connecting a rib drill rod and a second drill bit, and making the rib drill rod pass through the hole section to perform continuous drilling; and whenthe rib drill rod connected with the second drill bit drills to the deep hole section, replacing the second drill bit by adopting a third drill bit, the diameter of which is smaller than that of the second drill bit, to perform continuous drilling till the final hole. The embodiment of the invention realizes hole formation and hole protection of the broken abnormal zone, reduces the resistance ofdrilling to the deep hole section, and improves the efficiency of drilling to the deep hole section.

Description

technical field [0001] The embodiments of the present invention relate to the field of mining technology, and in particular to a method for drilling holes through broken abnormal zones in underground coal mines. Background technique [0002] In the process of underground drilling in coal mines, abnormal geological fracture zones are usually encountered. Such abnormal geological fracture zones are likely to cause borehole collapse and poor slag discharge, leading to buried drilling accidents. Therefore, how to form and protect holes has become an important issue in construction in geological fracture zones. [0003] In the process of realizing the present invention, the inventors found that: in the prior art, auger drill rods or flat drill rods are usually used to drill holes, but when the hole section encounters an abnormal broken zone, the hole is easy to collapse, and it is difficult to form a hole. And it is not easy to drill into the deep hole section. Contents of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/00E21B3/02E21B17/22E21B10/02
Inventor 袁亮方良才白国基崔兴安赵俊峰张锤金陈功胜汪金业
Owner HUAINAN MINING IND GRP
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