Mining Grouting & Reinforcement Drill Rig
Overview
Mining Grouting & Reinforcement Drill Rig is an integrated drilling-and-grouting system designed specifically for underground coal mines and subterranean engineering. It addresses ground reinforcement, water-hazard mitigation, and gas control while delivering efficient, safe, and adaptable operation. The unit’s core advantage is synchronous drilling-and-injection (“drill-and-grout-in-one”) capability, making it a critical piece of equipment for mine safety and underground construction.
Definition & Core Functions
Definition: A mining-grade drilling rig engineered for synchronized borehole drilling and grout injection to consolidate strata, control water and gas hazards, and strengthen surrounding rock/soil in underground and surface applications.
Core functions:
Coal-mine underground special operations
- Gas drainage (extraction/venting) boreholes: reduce in-mine gas concentration and lower explosion risk.
- Grouting for fire suppression: drill and inject extinguishing grout into spontaneous combustion zones.
- Coal seam water-injection holes: pre-wet coal seams to reduce dust generation during mining.
- Pressure-relief / outburst mitigation holes: reduce gas overpressure and protect mining safety.
Cross-disciplinary engineering reinforcement
- Underground works: grouting and consolidation for subway tunnels and mine roadways in collapse-prone sections.
- Surface works: foundation stabilization and sinkage repair under highways, buildings, and other civil structures.
Special process compatibility
- Back-out WSS (withdrawal-style) process enabling a single-pass drill → grout → consolidate workflow without repositioning, greatly improving productivity.
Multi-grout compatibility
- Supports single-fluid cementitious grouts, two-fluid systems (cement + sodium silicate), other low-viscosity/low-corrosivity grouts, and plain water for flushing or simple consolidation.
Main Types & Key Characteristics
Based on drive method and intended working environment, the main machine types are:
Pneumatic Grouting Pump
Power source: Compressed air (no mains electricity required).
Key traits: Simple structure, low operator training threshold; stepless output control and automatic constant-pressure regulation; supports 1:1 two-fluid grouting.
Best for: High-gas mines or sites with unstable power supply where eliminating electrical equipment reduces explosion risk.
Hydraulic Drill Rig ( Model 350)
Design highlights: Mechanical transmission with hydraulic feed; overall power transmission efficiency ≥ 95%. Compact, compact assembly/disassembly for transport.
Core advantages: Safe operation, low failure rate, low maintenance cost; rugged and durable — suitable for narrow roadways and complex conditions where coal transport passages exist.
Portability: Classified as a light grouting-hole drilling unit; some models weigh as little as 430 kg for easy movement in confined underground spaces.
100 Series Drill Rig
Drilling capability: Maximum borehole depth 100 m; drilling angle 0–360°; spindle speed selectable at 142 / 285 / 570 r/min for flexible operation.
Power & specs: Motor 11 kW; hydraulic system rated pressure 10 MPa; machine weight 450 kg; dimensions 1230 × 630 × 1280 mm.
Accessories: Compatible with diamond composite cutters to improve hard-rock drilling efficiency; suitable for roadways with low-to-moderate rock hardness.
Selection Recommendations
High-gas mines / unstable electrical supply: Prefer pneumatic grouting pump systems to avoid electrical hazards and ensure continuous operation with compressed-air support.
Deep-hole reinforcement (>100 m), lower power demand: Choose Model 350 — 150 m depth capability with modest 5.5 kW motor; ideal for narrow-section roadways.
Shallow-to-medium depth (≤100 m) with higher power needs and full-angle drilling: Choose Model 100 — 360° drilling flexibility and 11 kW motor; pair with diamond composite bits for harder rock.
Core Application Advantages
High Efficiency — Drill & Grout Synchronously
Integrated drilling-and-grouting reduces process handoffs and on-site setup time.
Robust hydraulic feed provides fast penetration rates; drill-rod retraction speeds up to 150 m/h dramatically shorten job cycles.
Safety & Reliability — Designed for High-Risk Mines
Explosion-proof construction meeting coal-mine standards enables safe operation in high-gas environments.
Hydraulic locking chuck automatically clamps the drill rod on power loss, preventing drop hazards.
Low fault frequency and durable core components reduce underground maintenance requirements.
Environmental and Site Adaptability
Suitable for mine roadways with cross-section ≥ 6.5 m² or width/height ≥ 2.5 m; also adaptable to inclined shafts and complex geometries.
Effective across strata with rock-strength coefficient ≤ 8, covering most coal-mine geology.
Cost-Effectiveness
Simple maintenance and high domestic parts localization reduce lifetime operating costs and speed spare parts procurement.
Long service life and high uptime deliver superior return on investment.
FAQs
Q：What types of grout does the rig support?
A: Supports single-fluid cementitious grouts, two-fluid systems (e.g., cement + sodium silicate), low-viscosity chemical grouts, and clean water for flushing. Confirm compatibility with grout viscosity and abrasive properties before use.
Q: Can the Model-100 be fitted with diamond bits for hard-rock drilling?
A: Yes. -100 supports diamond composite cutters and other hard-rock tooling to improve penetration and bit life on harder strata.
Q:How portable are these rigs for underground use?
A: Many units are designed for disassembly and have compact dimensions and weights ( 430–450 kg) for easy movement in confined roadways. Always confirm the mine roadway dimensions and lifting/transport arrangements before delivery.
Q: What safety features are standard?
A: Explosion-proof design options, hydraulic locking chucks that engage on power loss, safety interlocks, pressure-relief valves, and operator guards. Specific safety packages depend on selected model and certification requirements.