SPRAYING TEMPORARY SUPPORT AND BOLT PERMANENT SUPPORT METHOD AND SYSTEM

摘要

Disclosed are a spraying temporary support and bolt permanent support method and system; a tunnel excavation construction operation is composed of a plurality of operation cycle units, and each operation cycle unit comprises the following steps: tunnelling by at least one row pitch to form a newly excavated tunnel; spraying a spray material onto the surface of the newly formed tunnel to form a sealing spray layer on the surface of surrounding rock; and forming permanent support for the newly excavated tunnel by constructing bolts. Effective support is formed by means of a spray layer for a newly formed tunnel, tunnelling and support are successively achieved, the technological process is simple and convenient, and a heading machine-mounted roof or a self-moving shed support is not required to support surrounding rock, reducing consumed time and increasing a supportable area of a tunnel, and satisfying the requirements of rapid excavation of a coal mine tunnel. In addition, a manual carrying manner is not required to support a tunnel, reducing labor intensity and increasing support efficiency. Also disclosed is a drilling, grouting, anchoring, and pretensioning integrated bolt support device, comprising a bolt mechanism, a drive mechanism, a grouting mechanism, and a thrusting mechanism. Also disclosed is a construction method for a drilling, grouting, anchoring, and pretensioning integrated bolt support device. The drilling, grouting, anchoring, and pretensioning integrated bolt support device has a simple structure, is easy to operate, and ensures a support effect.