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Method for reinforcing pre-controlled roof room pillar method ore pillars
The invention provides a method for reinforcing pre-controlled roof room pillar method ore pillars, and belongs to the technical field of mining. According to the method, anchor rod operation is conducted on the ore pillars through a grouting method, a grouting slurry comprises a liquid A and a liquid B, the liquid A comprises, by weight, 45%-63% of Portland cement, 25%-46% of coal ash, 3%-7% of slag, 1.0%-2.0% of aluminum dihydrogen phosphate and 2.0%-3.0% of sodium hexametaphosphate, and the water-cement ratio is 0.7-1.1; and the liquid B comprises 15-25% of water glass, 5-28% of fly ash andthe balance of water. The grouting slurry provided by the invention has good stability, fluidity and stone rate, the gelation time is adjustable, and the stone body has high compressive strength anddurability; according to the invention, the supporting effects of anchor rods and grouting are organically combined together, the double effects of anchor rod supporting and grouting reinforcement areachieved, the integrity of the ore pillars can be ensured, the rock mass structure and the stress state of the ore pillars are improved, the stress concentration is reduced, and the self-bearing capacity of the ore pillars is improved.
本发明提供一种用于预控顶房柱法矿柱加固、补强的方法，属于采矿技术领域，对矿柱采用注浆方法进行锚杆作业，注浆浆液包括甲液和乙液，按重量百分比计，甲液包括硅酸盐水泥45‑63％、粉煤灰25‑46％、矿渣3‑7％、磷酸二氢铝1.0‑2.0％和六偏磷酸钠2.0‑3.0％，水灰比为0.7‑1.1；乙液包括水玻璃15‑25％、飞灰5‑28％及余量水。本发明注浆浆液具有较好的稳定性流动性及结石率，凝胶时间可调，结石体具有较高的抗压强度及耐久性；本发明将锚杆和注浆的支护作用有机结合在一起，具有锚杆支护和注浆加固的双重作用，可保证矿柱的完整性，改善矿柱的岩体结构和受力状态，降低应力集中，提高矿柱的自承载能力。
Method for reinforcing pre-controlled roof room pillar method ore pillars
The invention provides a method for reinforcing pre-controlled roof room pillar method ore pillars, and belongs to the technical field of mining. According to the method, anchor rod operation is conducted on the ore pillars through a grouting method, a grouting slurry comprises a liquid A and a liquid B, the liquid A comprises, by weight, 45%-63% of Portland cement, 25%-46% of coal ash, 3%-7% of slag, 1.0%-2.0% of aluminum dihydrogen phosphate and 2.0%-3.0% of sodium hexametaphosphate, and the water-cement ratio is 0.7-1.1; and the liquid B comprises 15-25% of water glass, 5-28% of fly ash andthe balance of water. The grouting slurry provided by the invention has good stability, fluidity and stone rate, the gelation time is adjustable, and the stone body has high compressive strength anddurability; according to the invention, the supporting effects of anchor rods and grouting are organically combined together, the double effects of anchor rod supporting and grouting reinforcement areachieved, the integrity of the ore pillars can be ensured, the rock mass structure and the stress state of the ore pillars are improved, the stress concentration is reduced, and the self-bearing capacity of the ore pillars is improved.
本发明提供一种用于预控顶房柱法矿柱加固、补强的方法，属于采矿技术领域，对矿柱采用注浆方法进行锚杆作业，注浆浆液包括甲液和乙液，按重量百分比计，甲液包括硅酸盐水泥45‑63％、粉煤灰25‑46％、矿渣3‑7％、磷酸二氢铝1.0‑2.0％和六偏磷酸钠2.0‑3.0％，水灰比为0.7‑1.1；乙液包括水玻璃15‑25％、飞灰5‑28％及余量水。本发明注浆浆液具有较好的稳定性流动性及结石率，凝胶时间可调，结石体具有较高的抗压强度及耐久性；本发明将锚杆和注浆的支护作用有机结合在一起，具有锚杆支护和注浆加固的双重作用，可保证矿柱的完整性，改善矿柱的岩体结构和受力状态，降低应力集中，提高矿柱的自承载能力。
Method for reinforcing pre-controlled roof room pillar method ore pillars
一种用于预控顶房柱法矿柱加固、补强的方法
TANG TAO (author) / ZHANG WEI (author) / CHEN HAIWEN (author)
2020-04-14
Patent
Electronic Resource
Chinese
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