DGMS Man Winding Speed & Haul Road Standards – Complete Notes for Exam GSR 975(E) & GSR 976(E)

🔹 1. G.S.R. 975(E) – Man Winding Speed in Shafts (Issued under Reg. 81(10)(b), CMR 2017)

📏 Maximum Rope Speed during Man-Winding (Normal Shafts)

Depth of Shaft Maximum Rope Speed (m/s) Remarks

Upto 100 m 2.0 m/s Automatic contrivance not required

101 – 300 m 4.0 m/s With contrivance

301 – 500 m 5.5 m/s Standard limit

501 – 700 m 7.0 m/s

701 – 1000 m 8.0 m/s

1001 – 1500 m 10.0 m/s

Above 1500 m 12.0 m/s Maximum possible speed

⛏️ Maximum Rope Speed during Shaft Sinking (special case)

Depth of Sinking Shaft Maximum Rope Speed (m/s) Remarks

Upto 150 m 1.5 m/s Very low, due to safety risks

151 – 500 m 2.5 m/s Moderate

>500 m 3.0 m/s Maximum for sinking

🔑 Key Interpretations & Notes

Automatic Contrivance (Overwind Protection Device):

Mandatory above 100 m depth.

Ensures safety against overwinding & hard landing.

Manager + Engineer jointly decide operational speed considering:

Condition of shaft

Rope strength

Winding engine capacity

Braking system efficiency

But 🚫 must never exceed the maximum speeds specified in GSR 975(E).

🔹 2. G.S.R. 976(E) – Haul Road Standards (Issued under Reg. 101, CMR 2017) 🛣️ General Rules for Haul Roads

Only HEMM allowed → trucks, dumpers, tippers, etc.

🚫 No pedestrians/two-wheelers.

🚫 No light vehicles (unless written permission & specific points).

Design & layout of haul roads → must be fixed at company level for each OC mine.

📏 Width of Haul Roads

Type of Traffic Minimum Width

One-way traffic Width of largest vehicle + 5 m

Two-way (single road for both directions) 3 × Width of largest vehicle + 5 m

Two separate haul roads (divider in middle) 2 × Width of largest vehicle + 3 m

📝 Note:

At sharp bends → ensure visibility ≥ 3 × braking distance of largest HEMM at 40 km/h.

If not possible → must construct two separate roads with divider, lights & reflectors.

⛰️ Gradients

Normal haul road: ≤ 1 in 16

Ramp (for crawler-mounted machines): ≤ 1 in 10, length ≤ 50 m at a stretch

❌ Tyre-mounted vehicles not permitted on steep crawler ramps.

🧱 Parapet Walls / Embankments (if haul road is above ground level)

Top width: ≥ 1 m

Bottom width: ≥ 2.5 m

Height: ≥ diameter of tyre of largest vehicle

❌ Dumped OB/mud = Not valid parapet

🚦 Other Safety Features

Separate haul road for light vehicles (if not, designated turnouts & crossings).

Fluorescent road signs at every turning point.

Zebra lines / vertical posts at every curve.

Drainage system on one side of haul road.

Max dumper speed: 30 km/h (by blocking higher gears or automatic governor).

🎯 Exam-Oriented Key Points to Remember 🪜 Man Winding (GSR 975(E))

Memory Hack: “2 – 4 – 5.5 – 7 – 8 – 10 – 12” with increasing depth.

Shaft sinking → 1.5 – 2.5 – 3.0

🛣️ Haul Roads (GSR 976(E))

Gradients:

Normal = 1/16

Ramp (≤50 m) = 1/10

Widths:

One-way = Width + 5 m

Two-way = 3× Width + 5 m

Separate = 2× Width + 3 m

Parapet: Top = 1 m, Bottom = 2.5 m, Height = Tyre dia

Visibility: 3 × braking distance (HEMM @ 40 km/h)

Dumper max speed: 30 km/h
📝 25 MCQs – DGMS Man Winding Speed & Haul Road Standards

Q1. What is the maximum rope speed for man winding in a shaft up to 100 m depth? (a) 2 m/s
(b) 4 m/s
(c) 5.5 m/s
(d) 7 m/s
(e) 8 m/s
✅ Answer: (a) 2 m/s
Explanation: For depth ≤ 100 m → 2 m/s, automatic contrivance not required.

Q2. At shaft depth of 300 m, what is the maximum permissible rope speed for man winding? (a) 2 m/s
(b) 4 m/s
(c) 5.5 m/s
(d) 7 m/s
(e) 10 m/s
✅ Answer: (b) 4 m/s
Explanation: For 101–300 m → 4 m/s.

Q3. The maximum rope speed allowed at 500 m shaft depth is: (a) 4 m/s
(b) 5 m/s
(c) 5.5 m/s
(d) 7 m/s
(e) 8 m/s
✅ Answer: (c) 5.5 m/s
Explanation: For 301–500 m → 5.5 m/s.

Q4. For shaft depth of 1000 m, maximum rope speed is: (a) 7 m/s
(b) 8 m/s
(c) 10 m/s
(d) 12 m/s
(e) 15 m/s
✅ Answer: (b) 8 m/s
Explanation: For 701–1000 m → 8 m/s.

Q5. At shaft depth of 1600 m, maximum rope speed during man winding is: (a) 8 m/s
(b) 10 m/s
(c) 12 m/s
(d) 14 m/s
(e) 15 m/s
✅ Answer: (c) 12 m/s
Explanation: Depth > 1500 m → 12 m/s.

Q6. During shaft sinking up to 150 m, maximum man winding rope speed = (a) 1.0 m/s
(b) 1.5 m/s
(c) 2.0 m/s
(d) 2.5 m/s
(e) 3.0 m/s
✅ Answer: (b) 1.5 m/s
Explanation: For sinking up to 150 m → 1.5 m/s.

Q7. During shaft sinking between 151–500 m, permissible rope speed is: (a) 1.5 m/s
(b) 2.0 m/s
(c) 2.5 m/s
(d) 3.0 m/s
(e) 4.0 m/s
✅ Answer: (c) 2.5 m/s
Explanation: For sinking 151–500 m → 2.5 m/s.

Q8. In shaft sinking beyond 500 m depth, maximum man winding speed is: (a) 2.0 m/s
(b) 2.5 m/s
(c) 3.0 m/s
(d) 3.5 m/s
(e) 4.0 m/s
✅ Answer: (c) 3.0 m/s
Explanation: For sinking >500 m → 3 m/s.

Q9. Who decides the actual man winding speed in a shaft? (a) DGMS only
(b) Mine Manager in consultation with Engineer
(c) Overman in charge
(d) Regional Inspector
(e) Safety Officer
✅ Answer: (b) Mine Manager in consultation with Engineer
Explanation: They decide based on shaft conditions, but speed must not exceed DGMS max limits.

Q10. Why are maximum man winding speeds restricted? (a) To reduce rope wear
(b) To prevent overwinding/hard landing
(c) To increase rope life
(d) To save electricity
(e) For faster winding
✅ Answer: (b) To prevent overwinding/hard landing
Explanation: Main purpose is safety of men during winding.

Q11. In opencast mines, haul road gradient shall not exceed: (a) 1 in 10
(b) 1 in 14
(c) 1 in 15
(d) 1 in 16
(e) 1 in 20
✅ Answer: (d) 1 in 16
Explanation: General gradient limit = 1 in 16.

Q12. Maximum gradient of ramps (for crawler machines only) allowed in OC mines is: (a) 1 in 8
(b) 1 in 10
(c) 1 in 12
(d) 1 in 14
(e) 1 in 16
✅ Answer: (b) 1 in 10
Explanation: Ramp gradient ≤ 1 in 10, length ≤ 50 m per stretch.

Q13. Maximum length of a steep ramp stretch (1 in 10) is: (a) 10 m
(b) 20 m
(c) 30 m
(d) 40 m
(e) 50 m
✅ Answer: (e) 50 m
Explanation: Ramp should not exceed 50 m length at one stretch.

Q14. Minimum width of a one-way haul road in OC mines = (a) Width of largest vehicle + 3 m
(b) Width of largest vehicle + 5 m
(c) 2 × Width of vehicle + 3 m
(d) 3 × Width of vehicle + 5 m
(e) Width of two vehicles + 5 m
✅ Answer: (b) Width of largest vehicle + 5 m
Explanation: As per Reg. 101, GSR 976(E).

Q15. Where only one road is used for two-way traffic, its width shall be: (a) 2 × width of largest vehicle + 5 m
(b) 2 × width of largest vehicle + 3 m
(c) 3 × width of largest vehicle + 5 m
(d) Width of largest vehicle + 10 m
(e) 4 × width of largest vehicle
✅ Answer: (c) 3 × width of largest vehicle + 5 m
Explanation: Standard for two-way haul road.

Q16. Where two separate haul roads are provided, width of each road must be: (a) 2 × width of vehicle + 3 m
(b) 3 × width of vehicle + 5 m
(c) Width of vehicle + 5 m
(d) 2 × width of vehicle + 5 m
(e) Width of vehicle + 10 m
✅ Answer: (a) 2 × width of vehicle + 3 m
Explanation: Each road must be at least 2× vehicle width + 3 m.

Q17. At curves/bends, operators must have clear visibility of: (a) 2 × braking distance at 40 km/h
(b) 3 × braking distance at 40 km/h
(c) 50 m ahead
(d) 100 m ahead
(e) Any safe distance
✅ Answer: (b) 3 × braking distance at 40 km/h
Explanation: Clear view ≥ 3× braking distance.

Q18. Minimum top width of parapet wall on haul roads = (a) 0.5 m
(b) 1.0 m
(c) 1.5 m
(d) 2.0 m
(e) 2.5 m
✅ Answer: (b) 1.0 m
Explanation: Top width ≥ 1 m.

Q19. Minimum bottom width of parapet wall on haul roads = (a) 1.5 m
(b) 2.0 m
(c) 2.5 m
(d) 3.0 m
(e) 3.5 m
✅ Answer: (c) 2.5 m
Explanation: Bottom width ≥ 2.5 m.

Q20. Height of parapet wall must not be less than: (a) 1 m
(b) Half diameter of tyre
(c) Full diameter of tyre of largest vehicle
(d) 1.5 m
(e) 2 m
✅ Answer: (c) Full diameter of tyre of largest vehicle
Explanation: Height = tyre diameter.

Q21. What is the maximum speed of dumpers in an OC mine? (a) 20 km/h
(b) 25 km/h
(c) 30 km/h
(d) 35 km/h
(e) 40 km/h
✅ Answer: (c) 30 km/h
Explanation: Dumper speed restricted to 30 km/h by gear lock/automatic control.

Q22. Which of the following is NOT acceptable as a parapet wall? (a) Constructed wall
(b) Strong embankment
(c) OB/mud dumping
(d) Properly engineered wall
(e) Reinforced concrete
✅ Answer: (c) OB/mud dumping
Explanation: Dumping of mud/OB is not accepted as parapet.

Q23. Which of the following is prohibited on haul roads? (a) HEMM
(b) Light vehicles with written permission
(c) Two-wheelers
(d) Dumpers
(e) Tippers
✅ Answer: (c) Two-wheelers
Explanation: Pedestrians & two-wheelers not allowed.

Q24. Road signs on haul roads must be painted with: (a) White paint
(b) Black paint
(c) Fluorescent paint
(d) Yellow paint
(e) Reflective stickers
✅ Answer: (c) Fluorescent paint
Explanation: Mandatory for visibility at night.

Q25. At every curve on haul roads, which feature must be provided? (a) Speed breakers
(b) Stop signs
(c) Parapet walls or vertical posts with zebra lines
(d) Reflective stickers only
(e) Guard rails
✅ Answer: (c) Parapet walls or vertical posts with zebra lines
Explanation: Helps drivers stay on track, especially at night.

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DGMS Man Winding Speed & Haul Road Standards – Complete Notes for Exam GSR 975(E) & GSR 976(E)

🔹 1. G.S.R. 975(E) – Man Winding Speed in Shafts (Issued under Reg. 81(10)(b), CMR 2017)