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Forward-reverse-forward three-stage drilling mechanical rock breaking and shaft sinking method

A raise well drilling rig and forward technology, which is applied in the direction of reverse well sinking, well sinking, shaft equipment, etc., can solve problems such as construction of large-diameter shaft shafts, and achieve the effect of high degree of mechanization and high safety.

Inactive Publication Date: 2019-08-09
BEIJING CHINA COAL MINE ENG CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention is to construct underground engineering shafts such as mines, power stations, and tunnels. For the existing back shaft technology, it is impossible to construct large-diameter vertical shaft shafts in hard rock formations, and the lower roadway or tunnel that has been formed by the shaft shaft , to provide a mechanical rock-breaking drilling method that realizes drilling without going into the well, has the advantages of high mechanization and safety, and can form high-precision large-diameter wellbore forward-reverse-forward three-stage drilling

Method used

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  • Forward-reverse-forward three-stage drilling mechanical rock breaking and shaft sinking method

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Embodiment Construction

[0031] Forward-reverse-forward three-stage drilling mechanical rock-breaking drilling method:

[0032] (A) Wellbore excavation preparations, such as figure 1 shown.

[0033] (A-1) Using the roadway or tunnel that has been formed by the shaft, in the upper horizontal roadway or tunnel, based on the intersection of the axis of the shaft and the axis of the upper horizontal roadway or tunnel, and according to the maximum weight and volume of a single piece of equipment used, design Auxiliary tunnel to reach the required section;

[0034] (A-2) According to the weight and volume of the tunneling equipment, install the lifting equipment steel structure 1;

[0035] (A-3) Carry out lock opening excavation and support, and construct a concrete foundation that meets the requirements of the raising drilling rig equipment; the lock opening is excavated from the unstable topsoil layer 2 to the stable rock 3, pouring well wall concrete, constructing the drilling rig foundation, and pre- ...

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Abstract

The invention discloses a forward-reverse-forward three-stage drilling mechanical rock breaking and shaft sinking method. The forward-reverse-forward three-stage drilling mechanical rock breaking andshaft sinking method comprises the following steps: (A) shaft excavation preparation work is conducted; (B) first-stage forward drilling is conducted; (C) second-stage reverse drilling is conducted; (D) third-stage forward drilling is conducted; and (E) shaft supporting is conducted. Shaft sinking without lowering is achieved, the advantages of high mechanization degree, high safety and the like are achieved, and a vertical shaft with the diameter exceeding 6 m can be constructed in a formation with hard rock; and various functional needs are met, development of mechanical rock breaking and shaft sinking technologies is promoted, the functional needs such as lifting, ventilation and facility mounting are met, and the problems that in an existing shaft forming technology, many workers existin a well, the labor intensity is high, the operating environment is hard, safety conditions are poor, and the mechanization degree is low are solved.

Description

technical field [0001] The invention relates to the technical field of shaft construction in underground engineering. Specifically, it is a mechanical rock-breaking drilling method of forward-reverse-forward three-stage drilling. Background technique [0002] With the growth of demand for underground space engineering in my country and the acceleration of construction, a large number of shafts need to be built every year. Its construction technology is complex and the workplace is narrow, which occupies a very important position in terms of project volume and construction time. The quality of wellbore construction directly affects the normal use and later stability. [0003] After a long period of development, the ordinary well drilling method with umbrella drilling rock drilling and blasting, grab rock loading, and concrete wall building has reached the international advanced level after long-term development. However, there are problems such as low degree of mechanizati...

Claims

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Application Information

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IPC IPC(8): E21D1/03E21D3/00E21D1/08
CPCE21D1/03E21D1/08E21D3/00
Inventor 刘志强程守业韩博荆国业于见水邓建明
Owner BEIJING CHINA COAL MINE ENG CO LTD
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