Gangue-based shotcrete material for shotcrete support in coal mine tunnel

• Main Authors: JU FENG, XIAO MENG, GUO SHUAI, FU ZHIPENG, HUANG PENG, PEI YULONG
• Format: Patent
• Language: Chinese; English
• Published: 17.11.2017
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

The invention relates to a gangue-based shotcrete material for the shotcrete support in a coal mine tunnel. Local material allocation in the coal mine tunnel is conveniently conducted, and local materials are directly used. The material is composed of cement, sand, coal gangue, water and fast coagulant, wherein the weight ratio of cement, sand and coal gangue is 1: (0-2): (0-4), the requirements of coal mine tunnel support performance can be met by adjusting the proportion of each component and the gradation of coal gangue particle size. The gangue-based shotcrete material is applied to shotcrete support for underground coal mine tunnels, is high in strength and low in rebound rate, capable of reducing the discharge of coal gangue and the support cost by substituting gravel aggregate, and has important economic and engineering value. 本发明种用于煤矿巷道喷浆支护的矸石基喷浆材料，便于在煤矿巷道就地取料配置，直接在矿井下就地取材，由水泥、砂子、煤矸石、水和速凝剂组成，水泥：砂子：煤矸石重量比为1：0～2：0～4，可通过调节各组分比例和煤矸石粒径级配以满足煤矿巷道支护性能的要求。用于煤矿井下巷道的喷浆支护，其强度高、回弹率低，不仅可以减少煤矸石的排放量，而且可以通过替代石子骨料来降低支护