Heavy Mechanical & Subterranean Void Stabilization

Heavy Koepe Winders, Deep Hoisting Systems & Engineered Subterranean Backfilling

MMPL designs, supplies, installs and commissions winding systems and provides mine backfilling services to support underground operations.

Operational Status TIER-1 COMMISSIONED

Max Payload 60.0 TONNES

Hoist Velocity 16.0 M/S

DGMS Compliance 100% SEC 22A

Commission Hoisting Audit

SCHEMATIC: DUAL-ROPE KOEPE DWG-992-B

Drive: Synchronous AC Direct 4,500 kW

Factory-built directly at Central Engineering Works (CEW) Raniganj with computerized balancing, static testing, and integrated dynamic emergency multi-caliper disc brakes.

METRIC // 01 weight

60T

Peak Payload Capacity

Direct ore haulage per skip cycle in heavy metal applications.

METRIC // 02 height

1,500m

Vertical Depth Hoisting Reach

Multi-level synchronized haulage engineered for deep zinc and gold assets.

METRIC // 03 layers

4.8M m³

Subterranean Void Backfilled

High-density paste and hydraulic fill deployed with zero pillar collapse.

METRIC // 04 security

99.8%

Interlock & Brake SLA

DGMS Section 22A fail-safe mechanical brake uptime verification.

ENGINEERING CAPABILITIES // SUITE 04.1 - 04.4

Turnkey Hoisting & Stabilization Architecture

Manufactured and certified under rigid DGMS circulars, combining heavy structural steel fabrication at CEW Raniganj with cutting-edge German hydraulic drive systems.

SYSTEM 01 // FRICTION TECHNOLOGY DEEP BULK PRODUCTION

Multi-Rope Koepe Friction Winders

Dual-rope and 4-rope friction configurations engineered for high-tonnage vertical haulage. Equipped with direct-drive synchronous AC torque motors, polyurethane lined rope treads, deflectors, and electro-hydraulic multi-caliper disc brakes responding in under 40 milliseconds.

Rope Tension Balance: Automatic Hydraulic

Payload Range: 20 to 60 Metric Tonnes

Drive Motor: Up to 4,500 kW Inverter

Safety Factor: > 7.5x Static DGMS Metric

Field Proven: Sindesar Khurd & Agucha arrow_forward

SYSTEM 02 // DRUM TECHNOLOGY SINKING & MULTI-LEVEL

Heavy Cylindrical Drum Winders

Single and double grooved cylindrical drum installations dedicated to exploratory shaft sinking, sinking stage winches, and auxiliary personnel conveyance. Features mechanically clutched double drums enabling fast multi-level adjustments.

Drum Diameter: 2.4m to 5.5m Machined

Lebus Grooving: Multi-Layer Coiling

Braking Architecture: Parallel Caliper Spring

Clutch: Multi-tooth Radial Gear

Field Proven: BCCL Moonidih Coal Complex arrow_forward

SYSTEM 03 // STRUCTURAL CIVIL SURFACE HEADFRAME

Headframe Civil & Structural Steel Erection

High-tensile structural steel headframes fabricated at MMPL Central Engineering Works (CEW) Raniganj. Designed to absorb severe dynamic breaking overloads and peak line pulls in A-frame, 4-post box-girder, or tower-mounted multi-deck configurations.

Tower Height: Up to 68m Surface Erection

Sheave Wheels: 3.0m - 6.0m Cast Steel

Dynamic Factor: 2.5G Peak Rope Snatch

Fabrication Standard: IS 800 & DGMS Norms

In-House Manufacturing: CEW Raniganj arrow_forward

SYSTEM 04 // GROUND STABILIZATION PASTE & HYDRAULIC

High-Density Hydraulic & Paste Backfilling

Engineered subterranean void stabilization utilizing deslimed mill tailings, fly ash, and high-early-strength binders. Includes subterranean pressure-tight bulkheads, boreholes, and high-capacity surface slurry pump trains to maximize ore pillar recovery.

Pumping Viscosity: 74% - 82% Solids Content

Slurry Throughput: 250 m³/hr Continuous

Compressive Strength: 1.5 - 5.0 MPa (28 Days)

Subsidence Mitigation: Zero Ground Convergence

Field Proven: Hutti Gold Mines 1,000m RL arrow_forward

HOIST CONTROL DESIGN & SAFETY PRINCIPLES

Hoist Parameters & Brake Interlock Example

Illustrative engineering example. Values and diagrams explain system design; they are not site measurements or equipment status.

ILLUSTRATIVE DESIGN // SAMPLE PARAMETERS

precision_manufacturing KOEPE HOIST — REFERENCE CONFIGURATION

REFERENCE: HOIST DESIGN

Hydraulic Brake Pressure

165.2 BAR

Nominal Range: 155 - 180 BAR

Skip Depth Vector

-842.0 METRES

Shaft Sump: -1,500.0 METRES

Friction Rope Slip Factor

0.00% DELTA

Locked Micro-Phase Verification

Continuous Hoist Velocity Curve // 0 to 16 m/s Cycle Run 16.0 M/S STEADY RUN

0m Deck Acceleration Mid-Shaft Full Velocity (16 m/s) -840m Deceleration & Decking

DGMS SECTION 22A STATUTORY INTERLOCKS

Continuous triple-redundant logic checking physical limit switches, overwind headgear wedges, and hydraulic release dump banks.

Overwind Proximity Switch ARMED

Slack Rope Acoustic Array CLEAR (0.00)

Emergency Deadweight Drop STANDBY 100%

Brake Pad Caliper Wear Sensor 0.4mm (PASS)

Skip Gate Mechanical Interlock LATCHED

COMPARATIVE RIGOR MATRIX

Hoisting Mechanism Trade-Off Specifications

Detailed mechanical trade-offs evaluated by MMPL technical directors during initial mine equipping tenders, evaluating depth capacity, power consumption, rope fleet angles, and statutory certification costs.

Engineering Metric	Multi-Rope Koepe Friction	Heavy Double Drum Winder	Cryogenic Stage Winch Array	Paste Slurry Borehole Feed
Target Hoisting Depth	Up to 1,500m Vertical	Up to 800m Vertical	Up to 1,200m Shaft Sinking	Gravity head to 1,400m RL
Peak Payload Capacity	25 - 60 Metric Tonnes	10 - 25 Metric Tonnes	40T Sinking Stage Frame	250 m³/hr Slurry Stream
Rated Operating Speed	14.0 to 18.0 m/s	6.0 to 10.0 m/s	0.1 to 0.5 m/s Controlled	1.8 to 2.4 m/s Flow Velocity
Drive Power Rating	Up to 4,500 kW AC Vector	1,800 to 3,200 kW Inverter	4x 160 kW Hydraulic Winch	650 kW Triplex Plunger Pump
DGMS Statutory Rule	MMR 1961 Reg 76 & 80	CMR 2017 Reg 88 / MMR 74	DGMS Shaft Sinking Tech Cir	DGMS Stope Support Reg 112
Brake System Configuration	Multi-Caliper Disc (40ms)	Dual Caliper Parallel Post	Mechanical Worm Auto-Lock	Hydraulic Diverter Valves
Turnkey Fabrication Base	CEW Raniganj Machining Yard	CEW Raniganj Heavy Engineering	MMPL Modular Assembly	Surface Batching Plant Facility

DEPLOYED VERIFIED RECORDS

Institutional Proof of Execution

RECORD: 2018 — 2025 INSTITUTIONAL COMMISSIONS

COMMISSIONED

CASE 01 // HINDUSTAN ZINC LIMITED

Sindesar Khurd & Agucha Deep Koepe Installations

Turnkey installation and statutory commissioning of 4-rope Koepe friction hoist systems rated for 45-tonne bottom-dump skips at a vertical depth exceeding 1,000m. Ensured unbroken haulage throughput of 3.75 MTPA.

Scope: Headframe erection, winder alignment, rope tensioning, and SIL-3 safety circuit deployment.

HOIST DEPTH: 1,050M 45T SKIP

OPERATIONAL

CASE 02 // BHARAT COKING COAL LTD (CIL)

Moonidih Deep Seam Drum Winder Modernization

Mechanical modernization of high-capacity 3.2m cylindrical drum winder under intense Degree-III gassy coal seam standards. Re-machined drum journals, integrated digital overspeed governors, and overhauled fail-safe gravity drop brakes.

Scope: DGMS circular statutory compliance overhaul with zero lost-time incidents across 90 days.

SEAM: DEGREE-III GAS 3.2M DRUM

ACTIVE CYCLE

CASE 03 // HUTTI GOLD MINES CO LTD

1,000m RL Hydraulic Paste Stope Backfilling

Stabilization of ultra-deep extraction stopes prone to violent rockbursts. Engineered surface batching, vertical borehole slicklines, and engineered masonry bulkheads, safely backfilling over 1.2M m³ of void to permit 98% crown pillar recovery.

Scope: Ultra-high early strength paste backfill mix design and computerized surface delivery manifold.

DEPTH: 1,000M RL 1.2M M³ FILLED

DIRECT TENDER & AUDIT REQUEST

Initiate Winder Engineering or Backfilling Review

Submit project concessions, shaft dimensions, and target ore payload requirements directly to MMPL mechanical directors and CEW structural engineers.

verified_user Institutional NDA Protected Data Channel

gavel DGMS Section 22A Statutory Certified Reviewers

schedule 48-Hour Turnaround for Engineering Preliminary Specs

Raniganj Heavy Mechanical Works info@mmplmining.com

apartment

CONNECTED MINE INFRASTRUCTURE VERTICALS FROM FIRST BOREHOLE TO LAST TONNE

DIVISION 03 arrow_forward