Roadway Surrounding Rock Support Method with Graded Applied Pretightening Force
A technology of surrounding rock support and pre-tightening force, which is applied in the direction of earth drilling, mining equipment, bolt installation, etc., can solve the problems of poor support effect and achieve obvious anchoring effect
Active Publication Date: 2022-06-17
HUNAN UNIV OF SCI & TECH
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Problems solved by technology
[0004] The purpose of the present invention is to provide a roadway surrounding rock support method that can apply pre-tightening force in stages, and solve the problem that the support method of local anchorage and local grouting in the prior art cannot be spatially differentiated according to the mechanical structure of the roadway surrounding rock at different depths. The problem of poor support effect caused by support
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[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0040] Please see attached figure 1 to the attached Figure 16 , This embodiment provides a roadway surrounding rock support structure that can apply pre-tightening force in stages. The roadway surrounding rock support structure capable of applying pre-tightening force in stages includes a main body support structure applied to the roadway surrounding rock support and a detachable grouting sleeve applied to the roadway surrounding rock...
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The invention discloses a roadway surrounding rock support method capable of applying pretightening force in stages, comprising the following steps: drilling, and dividing the rock mass into a first section, a second section, and a third section according to the broken state of the rock mass in the hole. Section and the fourth section; then anchor the first section, the second section, the third section and the fourth section in sequence. The roadway surrounding rock support method that can apply pre-tightening force in stages provided by the present invention divides the rock mass into four sections according to the spatial difference of the rock mass, and adopts different support structures and support methods for different sections , in order to realize the differentiated support for spatially different rock masses, this method not only adopts the support structure combining anchor rod and anchor cable support, but also adopts the combination of anchoring agent anchoring and grouting anchoring, which is more applicable In the construction environment of deep high-stress roadway, it is more reliable than ordinary single anchor rod or anchor cable anchor support method, single anchor agent anchor or grouting anchor, and the anchor effect is more obvious.
Description
【Technical field】 [0001] The invention relates to the technical field of roadway surrounding rock reinforcement, in particular to a roadway surrounding rock support method capable of applying pre-tightening force in stages. 【Background technique】 [0002] In the process of coal mining, due to the complexity and variability of surrounding rock conditions, supporting structures such as bolts and cables have played an important role in supporting the surrounding rock of the roadway, ensuring resource mining and the safety of machinery and personnel. The investigation found that the most important support method in the control of surrounding rock of deep roadway at home and abroad is still the way of bolt and anchor cable combined with shotcrete support. The prestressed bolt can give a strong supporting force to the shallow broken rock mass and maintain the stability of the roadway structure; the prestressed anchor cable has good advantages in terms of structural length and supp...
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IPC IPC(8): E21D20/02E21D21/00
CPCE21D20/02E21D21/0026E21D21/0093
Inventor 范磊王卫军袁超隋毅
Owner HUNAN UNIV OF SCI & TECH