Mine bolt hole thread driven reaming drill pipe
A bolt hole and driving technology, which is applied in the direction of drill bits, drilling equipment, earthwork drilling, etc., can solve the problems of poor reaming performance, unstable reaming, difficult tool recovery, etc., and achieve stable reaming performance, safety and efficiency Mining and support, low cost effect
Active Publication Date: 2018-08-17
哈密豫新能源产业研究院有限责任公司
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Problems solved by technology
[0003] In view of the problem of bolt slipping and instability, some scholars try to solve this problem by reaming the bolt hole. Unstable holes, difficult tool recovery, etc.
Method used
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Embodiment Construction
[0017] Such as Figure 1-Figure 3 As shown, the mine bolt hole thread-driven reaming drill rod of the present invention includes a reaming tool, a casing 1, a push-pull rod 2, a drilling rig connecting shaft 3 and a push-pull drive sleeve 4, and the push-pull rod 2 is coaxially arranged In the casing 1, the casing 1 and the push-pull rod 2 are arranged horizontally along the front-to-back direction, the rear end of the reaming tool is connected to the front end of the push-pull rod 2, and two holes are symmetrically arranged on the front side of the casing 1 along the axial direction of the casing 1. The long hole 5 opened in the direction, the front end of the casing 1 is provided with a pressing structure for driving the reaming tool to extend radially out of the long hole 5, and the rear end of the casing 1 is coaxially fixedly connected with an inner diameter larger than the casing 1. The threaded pipe 6, the push-pull drive sleeve 4 coaxially extends into and is threaded ...
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The invention discloses an anchor bolt hole thread driving expanding drill pipe for mining. The drill pipe comprises a chambering cutter, a sleeve, a push-pull rod, a drilling machine connecting shaft and a push-pull driving sleeve, wherein the push-pull rod is coaxially arranged in the sleeve; the rear end of the chambering cutter is connected with the front end of the push-pull rod; two long holes are formed in the front side of the sleeve; a push structure is arranged at the front end of the sleeve; the push-pull driving sleeve coaxially extends into and is connected with the interior of an internal thread pipe through threads; a handle is arranged at the rear end of the push-pull driving sleeve; the rear end of the push-pull rod and the front end of the drilling machine connecting shaft are coaxially fixedly connected with each other; an external thread structure is arranged on the external circumference of the drilling machine connecting shaft; a driving guide block which is positioned in the internal thread pipe and is matched with the front end of the push-pull driving sleeve in a pushing manner is arranged on the push-pull rod. The drill pipe is simple to operate, low in cost and stable in chambering performance, and the cutter can be automatically opened and effectively retracted. The drill pipe can effectively solve the problem of failure of an anchor rod caused by sliding between the anchor rod and a hole wall, can effectively improve the safety situation of a mine, and improves the production efficiency of the mine.
Description
technical field [0001] The invention belongs to the technical field of roadway support, and in particular relates to a thread-driven reaming drill rod for mine bolt holes. Background technique [0002] Bolts used in underground roadway support have the characteristics of simple structure, convenient construction, and strong adaptability. Therefore, bolt support has become the main way of roadway support in recent years, but in the engineering application of bolt support, the failure form of the bolt is mainly due to the coal adhered to the hole wall during the anchoring process during the support process. The sliding between the anchor rod and the hole wall becomes unstable when the rock is gray or broken and soft. [0003] In view of the problem of bolt slipping and instability, some scholars try to solve this problem by reaming the bolt hole. Unstable holes, difficult tool recovery and other issues. Therefore, it is a new direction to propose a reaming drill pipe that i...
Claims
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IPC IPC(8): E21B7/28E21B10/32
CPCE21B7/28E21B10/325
Inventor 南华宋明洋孔赛博
Owner 哈密豫新能源产业研究院有限责任公司